Gwillym tikanga ingoa pai: Tahuri, Hou, Auaha, Ahua, Koa. Haere Gwillym tikanga o te ingoa.
Gu pai tikanga ingoa: Mātau, Waimarie, Tahuri, Ratarata, Koa. Haere Gu tikanga o ingoa.
Gwillym takenga o te ingoa tuatahi. Welsh form of William. Haere Gwillym takenga o te ingoa tuatahi.
Gwillym diminutives ingoa: Gwil. Haere I tapaina a hoki Gwillym.
Ingoa whakamutunga Gu tino noa i roto i China, Macau, Te Tai Tokerau Korea, South Korea, Taiwan. Haere Gu ingoa horahanga.
Ingoa faaauhia hoki Gwillym i roto i whenua rerekē me ngā reo: Bill, Billie, Billy, Guglielmo, Guilherme, Guillaume, Guillem, Guillermo, Gwilherm, 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. Haere Gwillym i ētahi atu reo.
Te nuinga ingoa noa ki te ingoa whakamutunga Gu: Zhenyu, Lavanya, Felicienne, Gi, Jiji, Félicienne. Haere Ingoa e haere ki Gu.
Hototahi o Gwillym a Gu he 79%. Haere Hototahi o Gwillym a Gu.