Too similar?

We just found out that we're having a baby girl! I've loved the name Nora Claire for years, and my husband likes it too. Claire holds a special significance to us too.

The issue is that my husband's brother's wife's name is Lorna Claire. My husband feels that those names are too similar, even if we make it clear why Claire is significant to us (not named after my sister-in-law). My sister-in-law is great, lives about 2,000 miles away, and we see her in person once or twice a year.

What do you think, are Nora Claire and her aunt Lorna Claire too similar?