 There is some vague evidence, that his father was Sirputis (probably descendant of other Sirputis, brother of Traidenis, Bardis, Liesis, and Svalkenis) and his grandfather was Viršulis, mentioned in chronicles.It is worth to note, that members of Astikai family on different occasions were referred to by these names.One of treaties signed by Kristinas Astikas mentions his father name, Radvilas.