Guillem eng yaxshi nom ma'nolari: Diqqat bilan, Jiddiy, Zamonaviy, Temperaturali, Saxiy. Qabul qiling Guillem ismining ma'nosi.
Guillem ismining kelib chiqishi. Catalan form of William. Qabul qiling Guillem ismining kelib chiqishi.
Boshqa mamlakatlar va tillarda, Guillem uchun alohida ismlar: 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. Qabul qiling Guillem boshqa tillarda.
Piker ismiga ega bo'lgan eng keng tarqalgan ismlar: Bulah, Gillian, Echo, Arlie, Karma. Qabul qiling Piker bilan ketadigan ismlar.