Respondents: 79 (This poll is closed)
I voted [name]Lionel[/name], [name]August[/name], [name]George[/name] & [name]Theodore[/name].
[name]Lionel[/name] - I absolutely adore this name, I don’t think it is used enough at all and I think it fits in so incredibly well with your other children’s names.
[name]August[/name] - I would love it more if it was [name]Augustus[/name]. I just would, it’s how the cookie crumbles. I love the nn [name]Gus[/name] though, and again I think it would fit well in your sib-set, I think [name]Augustus[/name] would fit better though as I think it has that same kind of, I want to say vintage, feel to them. I don’t know, I just see them doing a swing dance. (Sorry if my random comments start to sound odd, I am quite sleep deprived.)
[name]George[/name] - I love [name]George[/name], but I feel like he’d be the one without a built in nickname, and I know random nicknames usually come up out of nowhere, but still, it’s almost as if there’s something missing from the name.
[name]Theodore[/name] - I adore [name]Theodore[/name], it has pretty much an unlimited supply of nicknames ([name]Ted[/name], [name]Teddy[/name], [name]Ned[/name], [name]Neddy[/name], [name]Theo[/name], Thee, [name]Dory[/name]), I think it would go great with your other children’s names. As it happens, I was going to suggest [name]Theodora[/name] on your girls name thread, but didn’t purely because of the similar ending to [name]Ramona[/name].
I don’t want to suggest any other names as I am too in love with your current short list to feel the need to.
I voted for [name]Philip[/name] and [name]Samuel[/name] - I nearly voted for [name]Walter[/name] [name]Lionel[/name] and [name]Theodore[/name] and then changed my mind.
[name]Walter[/name] has a similar ending to [name]Esther[/name]. So does [name]Theodore[/name] so that’s why I decided against them. I find [name]Lyle[/name] hard to say with [name]Cal[/name].
[name]Philip[/name] is my favorite from your list. It has the same feel as your other children yet it’s own sounds. [name]Samuel[/name] may be a bit boring.
I really like the name [name]Theodore[/name] and all its nn potential! I also like [name]Samuel[/name], but it’s sssoooo popular, that I think I’d avoid it. I also really like the nn [name]Pip[/name] for [name]Phillip[/name]… But, [name]Phillip[/name] means “lover of horses” - which doesn’t do anything for me.
I voted for [name]Philip[/name], [name]August[/name], [name]Lewis[/name] and [name]Theodore[/name] 
Considering the siblings’ names, my favourites are [name]Lionel[/name] & [name]Philip[/name]. Interesting to see that [name]August[/name] is way ahead - would you consider [name]Tess[/name] and [name]Gus[/name] too close for siblings?
Good luck!
[name]Theodore[/name] and [name]August[/name] get my vote, I think they are lovely as stand alone names and also work beautifully with your sibset. They both have a French “feel” which is the same vibe I get from your other children’s names overall (though I know the names aren’t all French in origin).
I voted for [name]Philip[/name] (for [name]Pip[/name]!), [name]Theodore[/name] (for [name]Teddy[/name]!), [name]George[/name], [name]August[/name] (love it as much as [name]Gus[/name]!), [name]Samuel[/name] (which, I have to say, I adore with your others), and [name]Lewis[/name]. I just love your style too much. [name]Samuel[/name] is my favorite, followed by [name]Lewis[/name].
Good luck!