I saw someone over on CoinTalk asking for a family tree of Constantine, and oddly there really doesn't seem to be a decent one online, so here's one I recently put together myself - feel free to use it for whatever use you like.
The green triangles, and lines, represent marriages. It's a slightly unusual format I realize, but given the oddities of the relationships (e.g. Constantine's wife
Fausta being half-sister to
his step-mother
Theodora!) I couldn't find any online family tree
software that would
work, so
had to use GraphViz. It took quite a
bit of
work to untangle into a clean layout without crossed lines!
Note that Delmatius' name is really Flavius Dalmatius, same as
his father (
aka Dalmatius the
censor), but I stuck with
Delmatius since that's how he's normally known.
I've omitted a few known siblings that don't play any role in
the tetrarchy, specifically Valeria Maximilla's brother Candidianus, and Constantius's additional children with
Theodora: Anastasia, Eutropia and Hannibilianus (not to be confused with Delmatius' brother, Hannibilianus
rex regum, who appears on coins).
Click to enlarge.
Ben