Illiam moelelo wa lebitso le letle: E tebileng, Ela hloko, E sebetsang, E fanang ka, Bōpo. Fumana Illiam moelelo oa lebitso.
Pietrzak lebitso la motumo o motle ka ho fetisisa: Botsoalle, E na le bokhoni, Ela hloko, Mehleng ea kajeno, Bohale. Fumana Pietrzak se boleloang ke lebitso.
Illiam tšimoloho ea lebitso la pele. Manx form of William. Fumana Illiam tšimoloho ea lebitso la pele.
Lebitso la ho qetela Pietrzak le tloaelehileng haholo Poland. Fumana Pietrzak lebitso la lebitso le fetisetsang.
Mabitso a sa tšoaneng bakeng sa Illiam linaheng le lipuo tse sa tšoaneng: Bill, Billie, Billy, Guglielmo, Guilherme, Guillaume, Guillem, Guillermo, Gwil, Gwilherm, Gwilim, Gwillym, Gwilym, 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 Illiam ka lipuo tse ling.
Mabitso a tloaelehileng ka lebitso la ho qetela Pietrzak: Theresa, Chet, Belkis, Ryann, William. Fumana Mabitso a tsamaeang le Pietrzak.
Ho lumellana ha Illiam le Pietrzak ke 74%. Fumana Tšebelisano ea Illiam le Pietrzak.