Thank you for the suggestions. Read these out to OH last night. He's vetoed Herbert, something to do with Family Guy? (No idea why, I never watch it)
He quite likes Edward/Ted and William was on our list last time so may well be used this time. One of the problems is lots of close relatives all with quite traditional names. There are several I would use (including some mentioned above) but can't because they belong to brothers, nephews etc.