A word appearing as ᴱQ. rendole “cousinship” in the Qenya Lexicon of the 1910s, an abstract noun formation from ᴱQ. rendo “cousin” (QL/79).
Neo-Quenya: I would retain this word as ᴺQ. rendolë, an elaboration of ᴺQ. rendo “male cousin” from the Neo-Root ᴺ√RE(N)D.
A noun appearing as ᴱQ. {rendo >>} rēro (rendo) “kinsman, cousin” in the Qenya Lexicon of the 1910s, under the early root ᴱ√RESE “aid, support ?” (QL/79); the question mark was Tolkien’s. Tolkien later added a note to this entry clarifying that the “kin, cousin” words were derived from primitive reðe; see the entry on ᴱ√REÐE for further discussion.
Neo-Quenya: I would adapt this word as ᴺQ. rendo “male cousin, kinsman or relative” from a Neo-Root ᴺ√RE(N)D.