I kind of put this out there so I could see what peoples' opinions might be on
Marlene as a first name, I agree with you
Lena and
Molly are the only nicknames I *really* like out of all of the ones I listed.
Something that just popped into my head while writing this is
Marlene Theodosia, I think you could make tons of names with it it just seems one of those names that though people call it old fashioned it is very flexible in what it might be paired with.
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Ileana Elisabeth,
Francis Adriaan,
Théa Marlene and
Ira James /
Ira John.