Well, obviously there's not a law against it, but it an OK thing to do IYKWIM? Or is it weird, confusing etc?
DH has DCs from a previous relationship, all of whom have names from his language and ethnic group (don't want to specify which as it's very rare in the UK). We have given DD a first name from his ethnic group and middle names from mine and then our surname, also from his ethnic group.
We don't want to stick with his language for first names as we don't want to distinguish between his children and our children by their names (though they will inevitably look very different!)
But I have found two middle namea that I would love for DCs. However, one is sub-Sahan African and the other is Eygptian Coptic, and neither of us are African or Coptic. Does that matter, or will it cause endless confusion for a children who already has a complicated and unusual ethnic mix?
I'm not pregnant, BTW. Just being hypothetical...