I was going to suggest the initials thing similar to MiniMax's suggestion...
One of DPs friend's passed away when DP was 16 and his name was Chris - DPs initials are KRS we wanted to do something like that to honor his friend as we didn't want to use Chris or Christopher as the first name for a boy... but we decided on a boy's name that began with an O and hadn't decided on a middle name.
We had planned to do it for a girl as we had chosen a C name but we ended up going with an M middle name as the two names we chose just went together so well. We couldn't decide on a girl's R name to save us.
I hope you can work it out BW - it is something I can see myself having done.

