Is an appreciation gift for the family lawyer appropriate?

Nice dinner or lunch is appreciated usually. Or good wine although some could be offended.
My husband in his accounting practice almost always got booze as gifts. We had 20 shelves of alcohol from around the world. He hardly had glass of wine on occasion.
But he liked lunch or dinner the best.

If they are doing it "gratis" (for free) then giving them tokens of appreciation are fine. But if you are actually paying them, then I wouldn't give them anything as this is their job. If they are charging you but at a reduced rate, then again I think a small token of appreciation is fine.

Yes, a treat is perfectly acceptable and would be welcome. This is common in the South when one wants to show appreciation in a gracious way.

I am with Lea and Alva. Baked goods are always welcome. Maybe even flowers.

NO money. That wouldn't be appropriate. They are either doing this gratis (in which case thank them) or they are already charging you.
If they have been very kind, then donuts or something homemade is just great. A beautiful not to them is often treasured much more.

I see nothing at all wrong with bringing them baked goods to thank them for being kind. Sure, you're paying for their services, but acknowledging their kindness with an act of kindness of your own is a lovely gesture.

OK, thank you, I'll stick with money, thank you for your answers!

If you are already paying them then I would not give them anything.

Just stick with the Money .