Her two surviving sons were John , Count of Brienne , and Hugh of Brienne .
Mary 's parents were King Hugh I of Cyprus and Alice of Champagne , making her a maternal granddaughter of Queen Isabella I of Jerusalem .
Mary 's two surviving sons were John , Count of Brienne , and Hugh of Brienne .
Mary 's parents were King Hugh I of Cyprus and Alice of Champagne , making her a maternal granddaughter of Queen Isabella I of Jerusalem .