I love
Manfred. Too bad that I adore
Manny as the nn.
At first I was going to dismiss
Nekoda, as it reminds me too much of the trendy
Dakota, but I thought better about it and...the name intrigues me. Hmm.
Winfred is interesting. If only it didn't sound so much like
Winifred.
I think
Maynerd is my favorite name from your list. It begins with
May, which I think is a pretty sound. I'd have to change the spelling to
Maynard, though, for obvious reasons.
Ned doesn't work for me as a nn for
Theodore, sorry. I do, however, like
Theo.