Can’t recall title or author. It took place in Celtic Britian, and I think it was told in the first person by Cordelia, or maybe bits and pieces of it were. Some of the names were spelled a little differently - Lear was Lir, or Leir. I read it a year, year and a half ago I think, but I don’t think it was new at that time.
Although I remember which library branch I checked it out of the last time, I don’t have time to troll all the stacks hoping to luck into it again.
I will never laugh at my mom again for writing down every book she’s ever read!