This is a silly toy for exploring the genealogy of the monarchs of England
Blanche of Valois and Charles IV , Holy Roman Emperor are 3rd cousins once removed
Most recent common ancestors:
Henry II, Duke of Brabant
Maria of Swabia
Blanche of Valois's great great grand parent
Charles IV , Holy Roman Emperor's great great 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).