A conominal is a °nominal that can cooccur in the same minimal clause with a °person index and that is °coreferential with it.
The term was introduced in Haspelmath (2013). Note that when a person index can cooccur with a conominal, it is a cross-index or a gramm-index. ❡
Conominals are also often referred to as "appositional NPs", and a cross-indexing construction with a conominal is sometimes called "doubling" (because the referent appears to be expressed twice).
doubling (STR) = expression of a referent twice in a clause, by a referring phrase and simultaneously by an index. (Section 3.3.3)