Olivier is unusual but it's basically fancy
Oliver, and
Theodore and
Sebastian are also currently trendy-yet-classic boys names, so sure, they go together.
Ollie: Meh.
Theo: I like it!
Seb: Awful.
My problem with
Olivier is I would be unsure if I should pronounce it in a vaguely Frenchy way, e.g. Oliv-ee-ay, or totally English, e.g. Oliv-ee-err. I would certainly go with the first for an
Olivier Devereux, but not for an
Olivier Kowalski or McDonough. Most people will be familiar with the first pronunciation even in areas with zero French influence since that's how
Laurence Olivier pronounced his name, which will also likely be their only exposure to it as any sort of name, so keep that in mind.
Theodore and
Sebastian are the best combo.
This message was edited 10/1/2019, 1:57 PM