So exited too! Now, I understand where coleman comes from. Your G. G. Grandfather my G G Grandmother's godfather. She kept Coleman as family name when she had three children with Salomon Israel Da Costa (also named Frederick Coleman) because not married!
Attached a draft of my Family tree that I'm happy to share with you. I have some more photos and details to add of course, but what I miss is my G G Grandmother's portrait.
from the begening of my search, I'm very proud to say that I found out my GG Grandfather portrait while at Lloyd's, and Australian descendants from Edmund, my G Grandmother's brother who left England to Australia and whom we had no information.
Looking to hearing from you very soon
PS if you do not get the attached file, please provide with your email address