Guillem igama elona lifanelekileyo: Ilumkele, Kakhulu, Namhlanje, I-temperamental, Unika. Fumana Guillem intsingiselo yegama.
Guillem imvelaphi yegama lokuqala. Catalan form of William. Fumana Guillem imvelaphi yegama lokuqala.
Amagama alinganayo for Guillem kumazwe ahlukeneyo neelwimi: Bill, Billie, Billy, Guglielmo, Guilherme, Guillaume, Guillermo, Gwil, Gwilherm, Gwilim, Gwillym, Gwilym, Illiam, Jami, Jelle, Liam, Pim, Uilleag, Uilleam, Uilliam, Ulick, Vilĉjo, Vilém, Vilhelm, Vilhelmas, Vilhelmi, Vilhelmo, Vilhelms, Vilhjálmur, Vilho, Vili, Viliam, Vilim, Vilis, Viljami, Viljem, Viljo, Vilko, Ville, Villem, Vilmos, Wil, Wilhelm, Wilhelmus, Wilkin, Wilky, Will, Willahelm, Willem, Willi, William, Willie, Willy, Wilmot, Wim, Wiremu, Wöllem, Wullem, Wum. Fumana Guillem kwezinye iilwimi.
Amagama aqhelekileyo ngegama lokugqibela Halyday: Melva, Orlando, Guillermo, Tambra. Fumana Amagama ahamba kunye Halyday.