doter
noun/ˈdəʊtə(ɹ)/
Etymology From dote + -er.
1
Synonym of dotard (“old person with impaired intellect”).
- “Hold thy tongue! old doter; how should my daughter resemble thy son?”1843, Astolphe marquis de Custine, The Empire of the Czar, page 103:
2
Synonym of dotard (“one who dotes on another, showing excessive fondness”).