gerontonym
Etymology
From geronto- + -onym.
gerontonym means A term, title, or name used for an old person (or set of people). Lexicurio rates it Rare gem — a strength score of 77 out of 100.
noun
- A term, title, or name used for an old person (or set of people).“The Kenyah do not formally recognize any change in the individual's life, other than the acquiring of grandchildren, as a factor in the use of the gerontonym, but most people who are known by gerontonyms are beginning to "retire."”