We thought we were dont having kids but it turns out we aren’t! Here are some possibilities for baby number 4
Siblings are Rex, Dorothy, and Zelda
Possibilities
Top of the list right now is:
Ari
Rafael or Raphael
Rafe <---- my top choice right now
Other possibilities:
Arthur
Archibald
Simon
Harry
Harold
Harris
I love [name_u]Rafe[/name_u]! One of my favorites. I also love [name_u]Ari[/name_u], [name_m]Simon[/name_m], [name_m]Harris[/name_m], and…
[name_u]Wren[/name_u]
[name_u]Reed[/name_u]
[name_m]Otto[/name_m]
[name_u]Rocco[/name_u]
[name_u]Remy[/name_u]
[name_u]Cato[/name_u]
Max/Maxwell
[name_u]Roscoe[/name_u]
[name_u]Bowie[/name_u]
[name_u]Lucca[/name_u]
Congrats on baby number 4, and I hope this helps!
[name_u]Rocco[/name_u] was on my list but my husband vetoed it! But also I think his moms deceased cats name was [name_u]Rocco[/name_u] and that might be a contributor Haha
[name_u]Rex[/name_u], [name_f]Dorothy[/name_f], and [name_f]Zelda[/name_f]. Wow… Great mix.
I love [name_m]Archibald[/name_m] and [name_m]Harold[/name_m] with these. [name_u]Ari[/name_u] and Raphael/Rafael are lovely names, and I’m not a matching sibset cannister set person, but they seem odd man out in this retro list.
I honestly don’t know if you can beat [name_u]Rafe[/name_u] 
He is absolute perfection, especially with these siblings!
[name_u]Arthur[/name_u], [name_m]Simon[/name_m], [name_u]Harry[/name_u], and [name_m]Raphael[/name_m] (nn [name_u]Rafe[/name_u] would be delightful) are so so great
[name_u]Rafe[/name_u] or [name_m]Harris[/name_m] would be great!!!
[name_m]Rafael[/name_m] nn [name_u]Rafe[/name_u] is definitely my favourite!!! I can’t even picture any other name with your clan !
Congratulations on number 4!!
[name_m]Rufus[/name_m] nn Ru
[name_m]Ignatius[/name_m] nn [name_u]Iggy[/name_u]
[name_u]Montgomery[/name_u]
[name_u]Wiley[/name_u]
I think [name_u]Arthur[/name_u] would be amazing!
Other ideas:
[name_m]Alfred[/name_m]
[name_m]Allen[/name_m]
[name_m]Atticus[/name_m]
[name_u]Carroll[/name_u]
[name_u]Clyde[/name_u]
[name_m]Colin[/name_m]
[name_m]Damien[/name_m]
[name_u]Dillon[/name_u]
[name_u]Edward[/name_u]
[name_u]Ellis[/name_u]
[name_m]Hugo[/name_m]
[name_m]Jaren[/name_m]
[name_m]Jarett[/name_m]
[name_u]Jordin[/name_u]
[name_m]Josh[/name_m]
[name_u]Joss[/name_u]
[name_m]Kenneth[/name_m]
[name_u]Lee[/name_u]
[name_m]Leon[/name_m]
[name_u]Logan[/name_u]
[name_m]Oswald[/name_m]
[name_m]Patrick[/name_m]
[name_u]Quentin[/name_u]
[name_m]Sebastian[/name_m]
[name_m]Warren[/name_m]
[name_u]Wyatt[/name_u]
[name_m]Hi[/name_m] again!
Here are my thoughts if you add a little brother:
Ari-That’s my sweet little kitty’s name, so obviously I love it. It’s just charming & happy & cuddly.
[name_m]Rafael[/name_m] or Raphael-Rafael is gorgeous. But in a very manly way! I’m always annoyed by the fact that I can’t figure out exactly how to pronounce it though. I do prefer the ‘f’ spelling; seems sleeker.
Rafe-I love [name_u]Rafe[/name_u] w/your crew, & I actually do prefer just [name_u]Rafe[/name_u] w/Rex, [name_f]Dorothy[/name_f] & [name_f]Zelda[/name_f]. That being said, I usually like [name_u]Rafe[/name_u] best as a nn for [name_m]Rafael[/name_m]. And since you love both names, that seems like a winner!
Arthur-Super cute, but getting a bit popular. Still a great name. It’s a bit quiet next to your kids’ spunkier names, but certainly not a deal breaker.
Archibald-I don’t mind Archer/Archie, but the ‘bald’ part never sounds nice to me.
Simon-I like it. It doesn’t sparkle, but a cute name.
Harry-Same as above. I do prefer this one as a nn for [name_u]Henry[/name_u] or [name_m]Harrison[/name_m]. [name_m]Even[/name_m] though [name_u]Henry[/name_u] is so over done.
Harold-Oh, there you go! [name_m]Harold[/name_m] nn [name_u]Harry[/name_u] gets you two of your favorites.
Harris-Or this! I like this slightly more than [name_m]Harold[/name_m].
[name_f]Hope[/name_f] this helps. 
Came to suggest this too!
Have you thought of [name_u]Roscoe[/name_u]? Similar name without the iffy connections, haha!