Gwillym kacha mma aha pụtara: Enyịn, Oge a, Okike, Obodo, Eji obi ụtọ. Nweta Gwillym pụtara aha.
Rossa kacha mma aha nna pụtara: Oge a, Oké njọ, Okike, Iwe, Kechioma. Nweta Rossa pụtara aha nna.
Gwillym si malite aha mbụ. Welsh form of William. Nweta Gwillym si malite aha mbụ.
Gwillym aha diminutives: Gwil. Nweta Nicknames maka Gwillym.
Agakọta aha maka Gwillym na mba dị iche iche na-asụ asụsụ: 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. Nweta Gwillym na ndị ọzọ asụsụ.
Kasị nkịtị aha na aha ikpeazụ Rossa: Tracee, Roni, Velma, Kathlene, Marco. Nweta Aha na-aga na Rossa.
Ndakọrịta nke Gwillym na Rossa bụ 81%. Nweta Ndakọrịta nke Gwillym na Rossa.