From Middle English gladere, from Old English glædra (adj), glador (adv), comparative of glæd (“glad, shining, bright”). More at glad.
- One who makes glad or gives joy.
From Middle English glader, from Old English *gladere (“gladder”), from gladian (“to make glad”), equivalent to glad + -er.
(third-person singular simple present gladders, present participle gladdering, simple past and past participle gladdered)
From gladder (“one who makes glad”), or perhaps from Middle English *gladderen, from Old English *gladrian (“to make glad”), equivalent to glad + -er (“fequentative suffix”).