Please help us choose from these three names :)

We’ve narrowed our search down to three names for boys: [name_m]Arthur[/name_m]; [name_u]Dean[/name_u]; and [name_m]Theodore[/name_m]. I’ve listed the reservations/worries I have for each name below:

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What do you think of these three names? I’d really appreciate some outside opinions. Thank you!!