Known family members
- Donaghan Tremlett — a Muggle-born wizard and bass player for the popular band the Weird Sisters
- Mr Tremlett — a Muggle; father of Donaghan
- Mrs Tremlett — a Muggle; mother of Donaghan
- Mrs Tremlett — wife of Donaghan
Tremlett is an English surname of Norman-French origin, derived from Les Trois Minettes, a village in Calvados, France that was apparently once the site of three mines. Given Donaghan's musical profession, it may have been chosen in reference to tremolo (from the Italian, "shaking"), the rapid repetition of a single note or the alternation between multiple notes.