Daniel & [name_f]Eleanor[/name_f] are just lovely.
Here are my thoughts on the list-
Declan-Individually, I love [name_u]Declan[/name_u]. I have a little nephew named this, & he fits the name perfectly. It’s clever, interesting, sporty & lovable. It’s not the first name that I’d pair w/the more classic [name_m]Daniel[/name_m] & [name_f]Eleanor[/name_f], but I don’t think that it clashes.
Elias-This is a great name. It’s a slightly quirkier classic biblical name. I really like it w/Daniel, but I think it may be kind of close to [name_f]Eleanor[/name_f]? Maybe not.
Finn-Same as [name_u]Declan[/name_u], actually. I love it, & it gives me a similar vibe as [name_u]Declan[/name_u]. It doesn’t clash at all w/Daniel & [name_f]Eleanor[/name_f], but is a slightly different style. Mainly w/Daniel. I actually kind of love it w/Eleanor.
James-Ooh, this is nice. Smart, friendly & classic. Fairly popular if that bothers you. It works well w/your crew.
Riley-I personally like it, but it’s so popular & trendy for girls, I’d be worried to use it for a boy.
Rowan-Very handsome. Has the same Irish feeling as [name_u]Declan[/name_u] & [name_u]Finn[/name_u], but I think it’s a little more outdoorsy & sensitive/gentle guy feeling. I like it for you.
Vincent-This fits in pretty well. It’s maybe my least favorite from the list, because it just has that slight mob guy vibe. But it’s a good solid name.
Hope this helps.