I also like [name_m]Elden[/name_m], [name_m]Elwin[/name_m], and Elywn!
[name_f][/name_f]Of the -by names the most usable I think is [name_m]Digby[/name_m] [name_f][/name_f]- it’s really cute imo! It’s just inside the top 1000 in [name_f]England[/name_f] so possibly more familiar/usable here (not sure where you are based). Less keen on the -sby sound because it’s a little lispy for me, especially when there’s an L involved like Elsby.
[name_f][/name_f]You might like [name_m]Ashby[/name_m], [name_m]Barnaby[/name_m], [name_m]Colby[/name_m], [name_m]Ellerby[/name_m], [name_m]Jacoby[/name_m], or [name_m]Toby[/name_m]?
[name_f][/name_f][name_m]Elzie[/name_m], Elbie and [name_m]Ebbie[/name_m] are cute but do pull feminine, if that bothers you. Varen is interesting, I think I like it? Cauley is okay, spelled Caulay it could just be a nickname if you use [name_m]Macaulay[/name_m]?
[name_f][/name_f]Would very much avoid [name_m]Duff[/name_m] personally [name_f][/name_f]- in the UK it means broken/rubbish (i.e. a duff battery is one that doesn’t work), a ‘duffer’ is an idiot, being ‘up the duff’ is pregnant, plus it’s the beer from the Simpsons. There’s also that movie in which it stands for ‘designated ugly fat friend’ which, idk if anyone uses that irl but it’s not encouraging.