Yursha of Kiev - About Yursha

This Yursha was "Yursha Iwanowicz" (not Hankowicz) and from where you took that his father was "Hańko Litewski" i do not understand and wanna know about this!?
There is information about him:
"Юрша Иванович [пан Юрша; d[ominus] Yurscha Iwanowicz capitaneus in Brensky (вариант чтения — Bielsky); magnificos et strenuos milites nostros, videlicet Gyrssonem, pallatinum nostrum Kyowiensem; magnificum Gyrssonem, pallatinum nostrum Kyowienssem; Gerscha pallatinus Kyowiensis, воевода киевским пан Юр(ь)ша; Jursza woyewode Kyowien(sis); Iurscha pallatinus Kijowiensis]
https://coollib.com/b/468491-sergey-vladimirovich-polehov-naslednik...