I have a friend named
Tansy whose younger sister is named Merilee. It doesn’t sound like Mary-Lee in our accent, but also doesn’t sound exactly like “merrily” as the emphasis is subtly different.
I think it’s cutesy, but there’s plenty worse.
https://nanowrimo.org/participants/christine-seaforth-finch
http://christineseaforthfinch.blogspot.com/