I have put up an initial stab at a Taubman tree (for Goldie taubman family) - see www.manxnotebook.com/famhist/families/awm1889/goldie.htm#tree
(there is a much emptier one for Christians - will add more to this but I seem to have misplaced both my large Christian fam tree + Mrs Hinks Beach's book)
comments welcome - if I read the tree correctly then the only Tauman Royal descent is to the Goldie taubman line - no other male descent passes through the key link of Dorothy Christian - the earlier Christian in the tree were not decendants of Ewan