I like [name_u]Eden[/name_u] and [name_f]Mercy[/name_f] as sisters. [name_f]Vivienne[/name_f] and [name_u]Eden[/name_u] both have a lot of similar sounds so I’d probably not use them both for first names. What about [name_u]Eden[/name_u] [name_f]Amelie[/name_f] and [name_f]Mercy[/name_f] [name_f]Vivienne[/name_f] instead? [name_u]Noah[/name_u] and [name_u]Arlo[/name_u] round out [name_u]Eden[/name_u] and [name_f]Mercy[/name_f] well.
[name_u]Eden[/name_u] [name_f]Amelie[/name_f] - I love this - two of my favourites together and the sounds are sweet!
[name_f]Vivienne[/name_f] [name_f]Mercy[/name_f] - I like the pp’s suggestion of [name_f]Mercy[/name_f] [name_f]Vivienne[/name_f] but [name_f]Vivienne[/name_f] [name_f]Mercy[/name_f] is lovely too
[name_u]Noah[/name_u] [name_m]Foster[/name_m] - I’m not sure on the repeating end sounds here but it’s not the end of the world - [name_u]Noah[/name_u] is really cute but also ages well [name_u]Noah[/name_u] [name_m]Forrest[/name_m] might be nice too?
[name_u]Arlo[/name_u] [name_m]Isaac[/name_m] - [name_f]Lovely[/name_f] name, another two of my faves and they sound nice together
[name_u]Eden[/name_u] [name_f]Amelie[/name_f] – I love this combo! Stunning and flows so well. The names work together perfectly.
[name_f]Vivienne[/name_f] [name_f]Mercy[/name_f] – I really like this one as well! The rhythm is lovely and I adore the name [name_f]Vivienne[/name_f]. [name_f]Mercy[/name_f] makes a beautiful middle name.
[name_u]Noah[/name_u] [name_m]Foster[/name_m] – I love both names, and they pair really well together. I generally don’t love crazy-popular names, but [name_u]Noah[/name_u] is such a handsome one that I can ignore that. [name_m]Foster[/name_m] makes such a handsome middle, especially with [name_u]Noah[/name_u].
[name_u]Arlo[/name_u] [name_m]Isaac[/name_m] – I’ve never loved [name_u]Arlo[/name_u], but the flow of this combo works really well and I love [name_m]Isaac[/name_m]. It’s a bit vowel heavy but still a wonderful pairing.
Other name ideas-
[name_m]Zacharias[/name_m]
[name_m]Enzo[/name_m]
[name_m]Tobiah[/name_m]
[name_u]Everett[/name_u]
[name_m]Felix[/name_m]
[name_u]James[/name_u]
(clearly not all these suggestions are french and/or biblical, but I think they could possibly fit with your style anyway)
I really like all the names you’ve picked out for future children, and they work well together too. [name_u]Eden[/name_u], [name_f]Vivienne[/name_f], [name_u]Noah[/name_u], and [name_u]Arlo[/name_u] would be great siblings.