If no, why not? Thanks!
[name_f]Lillian[/name_f] and [name_f]Lydia[/name_f] are similar but not too close [name_f]IMO[/name_f]…but if they’re called [name_f]Lilly[/name_f] and [name_f]Lydie[/name_f], that could start to get confusing.
I don’t see why not!! They sound absolutely adorable together 
I think they are much too similar.
Yeah… they’re a bit similar. It’s not unacceptable like [name_f]Eliza[/name_f] and [name_u]Lisa[/name_u] or [name_f]Helen[/name_f] and [name_f]Eleanor[/name_f]. But both names together seem to reduce each others’ impact.
The only reason I would think to say no is that you might feel the need to continue the trend with a third child also having an L name.
It’s not something I would do because I don’t personally like alliteration in names or in sibsets at all.
I don’t see why not 
they sound really good together.