Question

I'm in love, with one I ne'er could pair.
But call me not a silly goose, for they're in me.

I'm all for vendettas, but ne'er did kill a soul.
Yet for taking revenge you will need my help.

My next of kin is twice the man I am,
Yet named more for the one I followed in.

You have already missed me twice,
Now speak and tell me truly: who am I?

Answer 1

I think it is the letter 'v'.
The letter 'v' is missing in the word never twice in the question.
It's used in the words love, revenge and vendetta.
Next to letter 'v' we have 'w' which can be compared to 2 v's written without gap.