Many happy returns! And thank you for a long and interesting list. Most of these names are timeless classics, which is interesting. I'll remove the ones I wouldn't put in a list of mine, OK?
William - I'd use
Daniel - family name; I'd use
James - I'd use
Charles - I'd use as a mn
Owen - pleasant, but my friend has a cousin Owen whom I've never met. She always calls him Owie!
Joseph - mn only
Jack - John, nn Jack, is a family name that I'd use; not Jack alone
Brian - I'd use
Thomas - family name (both my grandfathers!); I'd use
George - prefer Georgina for a girl; perhaps George as a mn