Help.

My Fiancé and I found out we are having a third girl today. We are set on Brantley for the first name but are having a hard time with the middle. We have already have our two girls named Dalis Kaye and Emma Kai (Ky) so naturally I wanted to keep the short “K” theme for the middle name. However we are discussing Hellen as a possibility. It is a family name for my Fiancé. Since we have Brantley set as the first name it would be a middle name. I do not want two middle names so it will either be Kade or Hellen. I like Hellen but I feel it is a strong name and doesn’t flow well with the first name we have. Please share your opinions and help us decide.