Eleanor Jillian sounds nice.
Best namesakes:
Jill -
Jill or
JillianDarlene -
Darlene or
DarlaDouglas -
DouglasDean -
Dane for a boy and
Deanna for a girl
Betty -
Elise,
Beth,
Elizabeth /
Elisabeth,
Bethan,
Isabelle /
Isabel /
Isobel,
Isabella,
Sabella, Isabeau,
Eliza,
Elsa,
Elspeth,
Lily,
Lillian,
Lillia /
Lilia (there are lots of great forms of
Elizabeth)
Lou -
Louis or
Ludovic for a boy and
Lovisa for a girl
Carl -
Carl for a boy or
Caroline for a girl
Roger -
Roderick (not really a form of
Roger, but it works)
Allen -
Allen or
Alain for a boy and
Alanna or
Alaina for a girl
Joshua -
JoshuaReinhold -
ReinFrida -
Frida although I prefer
Freya, but since they aren't related names, I don't know if it would work.