Wow! Both of them are on my PNL, but I've never thought about making a combo of them.
I probably sound strange, but I strongly prefer
Tessa to
Theresa.
Theresa lacks all the fun
Tessa has, imo.
Personal associations:
Tessa — yellow flowers, sunny spring.
Ione (in spite of the meaning) — fresh snow and frosty morning.
So, it's
Tessa Ione.
Siblings:
Leo Alexander &
Frida Lily