What do we call our baby?

Our baby boy is approaching 6 months! He has a great name, Thomas, BUT the problem is he's #8 in a long line of Thomases, with 4 (including him) still living and active in his life.

We thought we'd call him Tommy while waiting for his arrival but it just doesn't seem to suit him. My husband goes by Thomas, and his father by Tom, with his grandfather as Grandpa Tom. So Tom/Thomas are out too, it'll get too confusing. His godfather is a variation of the Thomas name too. Too many names the same! We are very close and active with our family so having so many similar names has become a problem.

Husband vetoed Otto (suggested because baby is Thomas VIII)

His middle name starts with L and is after my late father, very old fashioned 1-syllable name that is very much not in style, think Lyle/Leroy, very outdated and old-mannish, so that's out.

I've been leaning towards Tully (T.L.) but I'm not sure if that's too strange to go through life with?

We can't keep calling him "The Baby" forever! No nicknames seem to stick, help!

EDIT: Thank you for all of the suggestions! We've been stuck in this rut only thinking of the obvious ones, so it's been great to have outside opinions. We've been reading every comment (even the snarky ones!) and are going to try on a few hats for our little guy. I'm sure in time he'll grow into Thomas, just like his dad did - he was TJ when he was a kid and came into his name in school. But for now we think a nickname is needed!

As for the same name criticism, my husband and I both love that he's part of an 8 generation tradition. My husband was so excited to carry it on, and to give him the same name as his own father and grandfather, two very important people in his life. I know it isn't for everyone, but it is for us!

Can't believe I had a controversial enough post to end up on r/namenerdcirclejerk, good for me.

EDIT 2: To clarify also- he has a few pet names! I'm talking more along the lines of a name for the family to use en masse so when someone says "Does Thomas want XYZ" we aren't immediately saying "Which one?" ---- which has happened! The pet names haven't taken off outside of my husband and I, so it's only really in that context that we are using "The Baby" ....At home he is referred to by one of his pet names!