WikiRhymer has about 6,000 rhyming words and phrases for "Efron" starting with...

Heffron
    Pure Rhyme Set #1 of 1 (Add to/Edit Set Members)
    Words that have a pure rhyme on their last syllable only.
    deafen
      Geffen
        Steffan
          Steffen
            Stephan
              Stephen
                End Rhyme Set #1 of 534 (Add to/Edit Set Members)
                baron
                  barren
                    heron
                      marron
                        perron
                          lebaron
                            Aaron
                              Aran
                                Aron
                                  Barron
                                    Charon
                                      Charron
                                        Farren
                                          Farron
                                            Ferren
                                              Ferron
                                                Herren
                                                  Herron
                                                    Karen
                                                      Karon
                                                        McFerren
                                                          Sharon
                                                            Theron
                                                              Veron
                                                                Yaron
                                                                  End Rhyme Set #2 of 534 (Add to/Edit Set Members)
                                                                  Hebron
                                                                    Lebrun
                                                                      End Rhyme Set #3 of 534 (Add to/Edit Set Members)

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                                                                      Words that "almost" rhyme on the vowel-based rhyme sound of the stressed syllable like: be/eat or maybe/shapely. (Click for more info)
                                                                      deafen
                                                                        Geffen
                                                                          Steffan
                                                                            Steffen
                                                                              Stephan
                                                                                Stephen
                                                                                  Near Rhyme Set #1 of 76 (Add to/Edit Set Members)
                                                                                  baron
                                                                                    barren
                                                                                      heron
                                                                                        marron
                                                                                          perron
                                                                                            lebaron
                                                                                              Aaron
                                                                                                Aran
                                                                                                  Aron
                                                                                                    Barron
                                                                                                      Charon
                                                                                                        Charron
                                                                                                          Farren
                                                                                                            Farron
                                                                                                              Ferren
                                                                                                                Ferron
                                                                                                                  Herren
                                                                                                                    Herron
                                                                                                                      Karen
                                                                                                                        Karon
                                                                                                                          McFerren
                                                                                                                            Sharon
                                                                                                                              Theron
                                                                                                                                Veron
                                                                                                                                  Yaron
                                                                                                                                    Near Rhyme Set #2 of 76 (Add to/Edit Set Members)
                                                                                                                                    Hebron
                                                                                                                                      Lebrun
                                                                                                                                        Near Rhyme Set #3 of 76 (Add to/Edit Set Members)

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                                                                                                                                        Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."
                                                                                                                                        • des + done
                                                                                                                                        • des + one
                                                                                                                                        • des + son
                                                                                                                                        • ye + done
                                                                                                                                        • ye + mun
                                                                                                                                        • ye + none
                                                                                                                                        • ye + one
                                                                                                                                        • ye + run
                                                                                                                                        • ye + shun
                                                                                                                                        • ye + son
                                                                                                                                        • ye + sun
                                                                                                                                        • ye + won
                                                                                                                                        Mosaic Rhyme Set #1 of 1 (Add to/Edit Set Members)