↑ Specifically, he was the first cousin once removed of King Richard II; a nephew of King Henry IV; first cousin of King Henry V; first cousin once removed of King Henry VI; and more distantly related to subsequent British monarchs.
Watanabe, Morimichi (1988). Christianson, Gerald; Izbicki, Thomas M. (ed.). Nicholas of Cusa – A Companion to his Life and his Times. Ashgate Publishing Limited.