This is a silly toy for exploring the genealogy of the monarchs of England
John Montfort IV, Duke of Brittany and Joan of Navarre are 2nd cousins twice removed
Most recent common ancestors:
Beatrice of England
John II, Duke of Brittany
John Montfort IV, Duke of Brittany's great great great grand parent
Joan of Navarre's great grand parent

This somewhat silly thing made by
naath
Thanks to chiark for hosting this
Information sourced from wikipedia
All errors in transcription are mine.
Reports of errors, or ideas of interesting questions to ask
my database by email to naath@chiark.greenend.org.uk
(omissions of people are largely because I haven't got to them yet).