John William Friso is the most recent common ancestor of what
Dutch monarchs family tree: The following is a family tree for the Princes of Orange, a line which culminated in the Dutch monarchy with the accession of Prince William VI to the newly created throne of the Netherlands in 1815. Dutch monarchs family tree:  The family lineage is of note as John William Friso is the most recent common ancestor of all the current monarchs of Europe.
i don't know