Here’s a partial screen shot of the family tree (from Wikipedia) that includes Trajan, Hadrian, Plotina, Sabina, and other historical characters in the Dominus saga. Click on the image for a larger, legible version.
I adore that the creators of this genealogical chart included (with faint ‘love/affair’ connecting lines) Antinous, Attianus, and Suetonius. 😀
Here’s the link to an entry with the clickable version of this family tree to learn more about each fascinating character.