I really like [name_f]Liv[/name_f], [name_f]Tessa[/name_f] and [name_u]Quinn[/name_u]. I only like [name_u]Spencer[/name_u] on a boy as it feels quite masculine and on paper, I would expect a male. [name_f]Emily[/name_f] and [name_f]Sophie[/name_f] are both beautiful names, just very popular but that may not be something that you are concerned with.
I think those are all lovely names for a little girl! Both of your sons have strong names, so
I think [name_f]Tessa[/name_f] or [name_f]Emily[/name_f] for the girl!
I think [name_m]Connor[/name_m], [name_u]Jay[/name_u], and [name_u]Quinn[/name_u] make a great group of siblings! But, I don’t think you can go wrong with any of the names- they’re all wonderful choices.
I would add another strong to [name_m]Connor[/name_m] and [name_u]Jay[/name_u] so [name_f]Tessa[/name_f] gets my vote, followed by [name_f]Emily[/name_f]!
With [name_m]Connor[/name_m] & [name_u]Jay[/name_u], my top pick would be [name_f]Sophie[/name_f], with [name_f]Liv[/name_f] & [name_f]Tessa[/name_f] being close behind. I think all three would work well. [name_f]Emily[/name_f] is a little overused, but also doesn’t really match the style of [name_m]Connor[/name_m] and [name_u]Jay[/name_u], imo. [name_u]Spencer[/name_u] & [name_u]Quinn[/name_u] sound, to me, like brothers of [name_m]Connor[/name_m] & [name_u]Jay[/name_u] (especially [name_u]Spencer[/name_u]).