Hannigan rhymes with:
hanigan, branigan, brannigan, flanigan, flannigan, hanigan, lanigan, shenanigan, bennigan, branigan, brannigan, donigan, dunnigan, finigan, finnigan, flanigan, flannigan, hanigan, henigan, hennigan, lanigan, shawinigan, shenanigan, swanigan
Hannigan sounds like:
hamson, hanagan, hangen, hangin', hangman, hanigan, hanjin, hanken, hankin, hannagan, hanneken, hannesson, hanscom, hansen, hanshin, hansma, hansman, hansmann, hansom, hanson, hanssen, hansson, heineken, heinsohn, heinzen, heinzman, heinzmann, hemmingsen, hemmingson, hemocyanin, henchman, henchmen, heneghan, henigan, henken, henkin, hennigan, henningsen, henschen, hensen, henson, hinchman, hingham, hinkson, hinson, hinzman, homogeny, honasan, humanism, hunchine, hynson