Of yours I like
Ottilia Margot quite a bit!!
I pronounce
Ottilia more like oh-TEEL-ee-ah, but I used to pronounce it just like you. I like it both ways.
I don't personally think
Ottilia looks like the word otter, but I have seen it before on the boards. I didn't know if maybe I just wasn't seeing it because of how much I like the name.