Slightly hypothetical at this point, but something I'm thinking about.
I have special guardianship to 8 year old DD, whom I'm planning on adopting at some point in the future if everything goes to plan. If this were to happen, I'd want to give DD my surname.
The first three letters of DD's first name are the same as the first three letters of my surname, though it is a slightly different sound when pronounced as part of the name. The fifth letter of each is also the same. I don't think it sounds too matchy when spoken, but it does a bit written down. Would I be mad to even consider inflicting it on DD at some point in the near future?