Elinor Plunkett - Name "Elinor"

Dear (C) Private User
could you kindly let the world know where the source of the name "Elinor" comes from?
because the respective wikis ENG of the father & husband do not know the exact name:

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"an unnamed daughter" who married Barnaby Skurlock.
*https://en.wikipedia.org/wiki/John_Plunket_(judge)_

He married "a daughter" of the Lord Chief Justice of Ireland, Sir John Plunket,
and they had at least two sons:
*https://en.wikipedia.org/wiki/Barnaby_Skurloke_or_Skurlog