Ocallahan rhymes with:
o'callahan, callahan, o'callahan, callahan, o'callahan, callahan, o'callahan, callahan, harahan, mcgranahan, o'callahan
Ocallahan sounds like:
o'callahan, oklahoma, oklahoman, oslin
o'callahan, callahan, o'callahan, callahan, o'callahan, callahan, o'callahan, callahan, harahan, mcgranahan, o'callahan
o'callahan, oklahoma, oklahoman, oslin