Donegan rhymes with:
dunegan, dunigan, finegan, jarnigan, jernigan, colligan, costigan, dunegan, dunigan, finegan, hourigan, jarnigan, jernigan
Donegan sounds like:
damson, dancin', danskin, danson, denison, denizen, dennison, denshin, denson, dimension, dingham, dingman, dionysian, domeniconi, dominican, dominicana, dongen, dongmei, donigan, dunagan, duncan, dunegan, dungan, dungeon, dunigan, dunkin, dunkin', dunnagan, dunnigan, dunson, dyansen, dynamism, dynascan