Name help

Is Lennon too close to Landon? My nephews name is Landon and I love the name Lennon for a girl. Is that too close? Do we think my sister would be upset?

NOT ASKING WHETHER OR NOT YOU LIKE THE NAME. Just wondering if it’s TOO close.

Edit: I could ask her, but she’s the type to say it’s fine even if it isn’t and then she’ll secretly be upset.