Hepburn's rhymes with:
cockburn's, rathburne's, swinburne's, swinburnes, caverns, cisterns, cockburn's, eastern's, governs, interns, irons, lanterns, mcgovern's, moderns, northern's, northwestern's, patterns, rathburne's, saturn's, saturns, severns, southeastern's, southern's, swinburne's, swinburnes, taverns, western's, westerns
Hepburn's sounds like:
havranek, hibernia's, hovering, hybrienko