My husband and I have settled on [name_u]Theo[/name_u] for the first name but we are struggling to come up with the perfect middle name. Some of the contenders are:
[li][/li]
[li][/li]
[li][/li]
[li][/li]
[li][/li]
Any other suggestions are welcome! 
I like [name_u]Theo[/name_u] [name_m]Sebastian[/name_m] best of your options
[name_u]Theo[/name_u] [name_u]August[/name_u]
[name_u]Theo[/name_u] [name_m]Augustus[/name_m]
[name_u]Theo[/name_u] [name_m]Abraham[/name_m]
[name_u]Theo[/name_u] [name_m]Alexander[/name_m]
[name_u]Theo[/name_u] [name_m]Bennett[/name_m]
[name_u]Theo[/name_u] [name_m]Benjamin[/name_m]
[name_u]Theo[/name_u] [name_m]Dominic[/name_m]
[name_u]Theo[/name_u] [name_u]Everett[/name_u]
[name_u]Theo[/name_u] [name_u]Emmett[/name_u]
[name_u]Theo[/name_u] [name_u]Elliott[/name_u]
[name_u]Theo[/name_u] [name_m]Ezekiel[/name_m]
[name_u]Theo[/name_u] [name_m]Ezra[/name_m]
[name_u]Theo[/name_u] [name_m]Finnegan[/name_m]
[name_u]Theo[/name_u] [name_m]Graham[/name_m]
[name_u]Theo[/name_u] [name_m]Greyson[/name_m]
[name_u]Theo[/name_u] [name_m]Gideon[/name_m]
[name_u]Theo[/name_u] [name_m]Gabriel[/name_m]
[name_u]Theo[/name_u] [name_m]Henry[/name_m]
[name_u]Theo[/name_u] [name_m]Harrison[/name_m]
[name_u]Theo[/name_u] [name_m]Julian[/name_m]
[name_u]Theo[/name_u] [name_m]Jasper[/name_m]
[name_u]Theo[/name_u] [name_u]Jude[/name_u]
[name_u]Theo[/name_u] [name_m]Maverick[/name_m]
[name_u]Theo[/name_u] [name_m]Miles[/name_m]
[name_u]Theo[/name_u] [name_m]Malachi[/name_m]
[name_u]Theo[/name_u] [name_m]Nathaniel[/name_m]
[name_u]Theo[/name_u] [name_m]Oliver[/name_m]
[name_u]Theo[/name_u] [name_m]Oscar[/name_m]
[name_u]Theo[/name_u] [name_m]Reuben[/name_m]
[name_u]Theo[/name_u] [name_m]Shepherd[/name_m]
[name_u]Theo[/name_u] [name_m]Vincent[/name_m]
[name_u]Theo[/name_u] [name_m]Wilder[/name_m]
[name_u]Theo[/name_u] [name_m]Xavier[/name_m]
[name_u]Theo[/name_u] [name_m]Sebastian[/name_m] is perfect! Some other ideas:
[name_u]Theo[/name_u] [name_u]Hudson[/name_u]
[name_u]Theo[/name_u] [name_m]Jasper[/name_m]
[name_u]Theo[/name_u] [name_m]Felix[/name_m]
[name_u]Theo[/name_u] [name_m]Xavier[/name_m]
[name_u]Theo[/name_u] [name_m]Raphael[/name_m]
[name_u]Theo[/name_u] [name_u]Jude[/name_u]
[name_u]Theo[/name_u] [name_m]Alastair[/name_m]
[name_u]Theo[/name_u] [name_m]Caspar[/name_m]
[name_u]Theo[/name_u] [name_m]Bastian[/name_m]
[name_u]Theo[/name_u] [name_m]Gabriel[/name_m]
[name_u]Theo[/name_u] [name_m]Xander[/name_m]
[name_u]Theo[/name_u] [name_m]Lucien[/name_m]
[name_u]Theo[/name_u] [name_m]Dashiell[/name_m]
[name_u]Theo[/name_u] [name_u]Flynn[/name_u]
I’ll echo [name_u]Theo[/name_u] [name_m]Sebastian[/name_m]. It makes the shorter first name feel more complete, and has a nice balance.
[name_u]Theo[/name_u] [name_m]Sebastian[/name_m] - This is my favourite of your options! It’s perfect - a balance between the length of the names and it flows beautifully.
[name_u]Theo[/name_u] [name_m]Issac[/name_m] - I like this! The double vowel sound between the end of [name_u]Theo[/name_u] and [name_m]Isaac[/name_m] is the only reason I don’t love it as much as [name_u]Theo[/name_u] [name_m]Sebastian[/name_m], but it still flows well. I adore the name [name_m]Isaac[/name_m].
[name_u]Theo[/name_u] [name_m]Isaiah[/name_m] - I much prefer [name_m]Isaac[/name_m], I’m not a fan of biblical names and I think it flowed better.
[name_u]Theo[/name_u] [name_m]Josiah[/name_m] - This eliminates the double vowel sound, but for some reason I still don’t love it, I think it’s because I don’t like biblical names 
[name_u]Theo[/name_u] [name_m]Eli[/name_m] - [name_m]Eli[/name_m] is a beautiful name, but next to [name_u]Theo[/name_u], I think it might be too short.
I absolutely love [name_u]Theo[/name_u] [name_m]Josiah[/name_m]!!! [name_u]Theo[/name_u] [name_m]Sebastian[/name_m] is great too, but I like [name_u]Theo[/name_u] [name_m]Bastian[/name_m] just a little bit more.
I like [name_u]Theo[/name_u] [name_m]Sebastian[/name_m] too! [name_m]How[/name_m] about [name_u]Theo[/name_u] [name_u]Jameson[/name_u]