[name_m]Just[/name_m] for fun, if siblings were [name_f]Summer[/name_f], [name_u]Timothy[/name_u], & [name_m]Peter[/name_m]
I’m considering
[name_u]Aubrey[/name_u]
[name_u]Alma[/name_u]
[name_f]Jane[/name_f]
[name_f]Hope[/name_f]
[name_f]Joy[/name_f]
[name_f]Mae[/name_f]
[name_f]Elizabeth[/name_f]
[name_f]Esther[/name_f]
Suggestions are appreciated 
I like [name_u]Aubrey[/name_u] with other other names! [name_u]Aubrey[/name_u] [name_f]Mae[/name_f] or [name_u]Aubrey[/name_u] [name_f]Elizabeth[/name_f] is nice!
Thank you for your input ! I love those combos
[name_u]Alma[/name_u], [name_u]Aubrey[/name_u] or [name_f]Hope[/name_f] would be perfect!!
I’d also suggest
[name_f]Clara[/name_f]
[name_u]Skye[/name_u]
[name_f]Emmeline[/name_f]
[name_f]Dahlia[/name_f]
[name_f]Beatrix[/name_f]
[name_f]Stella[/name_f]
[name_f]Pearl[/name_f]
[name_f]Juliet[/name_f]
[name_f]Maia[/name_f]
I like [name_u]Alma[/name_u] and [name_f]Jane[/name_f]! For myself, [name_f]Willa[/name_f] and [name_u]Holly[/name_u] come to mind 
Oooh love those suggestions
[name_f]Summer[/name_f], [name_u]Timothy[/name_u], [name_m]Peter[/name_m] and…
of your options I like
[name_u]Alma[/name_u]
[name_f]Mae[/name_f]
[name_f]Esther[/name_f]
Other suggestions…
[name_f]Autumn[/name_f]
[name_u]Winter[/name_u]
[name_f]April[/name_f]
[name_f]Sienna[/name_f]
[name_u]Sierra[/name_u]
[name_u]October[/name_u]
[name_f]Maple[/name_f]
[name_u]Willow[/name_u]
[name_u]Rain[/name_u]
[name_u]River[/name_u]
[name_f]Wildrose[/name_f]
Annarose
[name_f]Poesy[/name_f]
[name_u]Swan[/name_u]
[name_u]Wren[/name_u]
[name_u]Sunrise[/name_u]
[name_u]Skye[/name_u]
[name_f]Shirley[/name_f]
[name_f]Kinsley[/name_f]
[name_f]Elsie[/name_f]
[name_f]Lorelei[/name_f]
[name_u]June[/name_u]
[name_u]Juniper[/name_u]
[name_f]Elinor[/name_f]
[name_f]Estelle[/name_f]
[name_u]Seren[/name_u]
[name_u]Dove[/name_u]
Ocean/Oceane
[name_u]Haven[/name_u]
[name_u]Hazel[/name_u]
[name_f]Heather[/name_f]
[name_f]Ebony[/name_f]
I would pick [name_f]Mae[/name_f]. Same happy vibe as [name_f]Summer[/name_f] but more of a classic like [name_u]Timothy[/name_u] and [name_m]Peter[/name_m]
I’m really drawn to [name_f]Esther[/name_f] with [name_u]Timothy[/name_u] and [name_m]Peter[/name_m]. I feel summer would fit really well with [name_u]Aubrey[/name_u] , [name_f]Hope[/name_f] and [name_f]Joy[/name_f]
Ultimately I think [name_f]Summer[/name_f] , [name_f]Esther[/name_f] (Essie) [name_u]Timothy[/name_u] and [name_m]Peter[/name_m] are my favourites together as a sibling set
I think [name_u]Aubrey[/name_u] [name_f]Jane[/name_f] or [name_f]Jane[/name_f] [name_u]Alma[/name_u] sound cute with the other siblings
Alma or Aubrey would be the perfect sister to tie in with Summer, Timothy, & Peter