You may see these words used in old newspapers and I’ve seen them on tombstones:
consort: wife, husband, companion, a deceased woman who leaves behind a surviving spouse
relict: surviving spouse usually a widow, an archaic word
The web of our life is of a mingled yarn, good and ill together. – William Shakespeare
Ann Cushman provides a marvelous resource of odds and ends and tidbits and stuff from the unusual to the amusing. In between, you might find a clue or a new source of information to aid your research.