Respondents: 41 (This poll is closed)
You have lovely options!
[name_f]Polly[/name_f] I like but don’t love. I personally think of [name_f]Polly[/name_f] pocket.
[name_u]Riley[/name_u] was trendy for a while but I think its peak has passed.
I voted for [name_f]Leni[/name_f]! I love it, I think this spelling makes it feminine, cute and complete.
I like the name [name_f]Eleanor[/name_f] but I don’t think you need a full for [name_f]Leni[/name_f].
[name_f]Heidi[/name_f] would be my second choice.
Of the middles I think [name_f]Therese[/name_f] is perfect, it suits “ee” names nicely and it is pretty cool that it honours two family members.
All the best 
My favourite is [name_f]Heidi[/name_f] [name_f]Therese[/name_f]! My favourite first name you have is [name_f]Eleanor[/name_f] however I am not a fan of [name_f]Leni[/name_f] at all sorry. I also really like the name [name_u]Riley[/name_u], and don’t mind the combo [name_u]Riley[/name_u] [name_f]Frances[/name_f], but they feel a little mismatch (as does [name_u]Riley[/name_u] [name_f]Therese[/name_f]). [name_f]Polly[/name_f] is pretty, but none of the combo wow me unfortunately.
[name_f]Heidi[/name_f] is such a beautiful and underused name. Both [name_f]Heidi[/name_f] [name_f]Therese[/name_f] and [name_f]Heidi[/name_f] [name_f]Frances[/name_f] flow well, but I much prefer the former!
Instead of [name_f]Leni[/name_f] or [name_f]Eleanor[/name_f] nn [name_f]Leni[/name_f], what about using the name [name_f]Eleni[/name_f]? It’s so pretty and is a good way to combine the two!
I would personally go with [name_f]Eleanor[/name_f] [name_f]Therese[/name_f] (nn [name_f]Leni[/name_f]) which wasn’t one of your picks but kind of mashes up two of them! I love [name_f]Leni[/name_f], it’s so cute, but I usually prefer a nickname name to have a longer official form, especially if it’s traditionally a more ‘boy’ name. And I agree [name_f]Eleanor[/name_f] [name_u]Teddy[/name_u] (nn [name_f]Leni[/name_f]) doesn’t quite work because of the boy-boy vibe.
I also love [name_f]Polly[/name_f]!
[name_f]Polly[/name_f] [name_f]Therese[/name_f] is really lovely! That is my favorite.
I voted for [name_f]Polly[/name_f] [name_f]Therese[/name_f]! My great-grandmother, [name_f]Theresa[/name_f], was actually called [name_u]Teddy[/name_u], so [name_f]Therese[/name_f] could honor three family members in my eyes.