piano chord
D♭m7♭5
D♭1F♭♭3A♭♭♭5C♭♭7
A diminished triad with a minor seventh rather than a diminished one — half diminished, and not the same chord as dim7.
Written the other way round it is C♯m7♭5 — the same twelve keys on a piano, a different piece of notation.
What is true of it
D♭m7♭5 is D♭, F♭, A♭♭ and C♭ — 1, b3, b5 and b7 counted from D♭.
A♭♭ is a double flat, and it has to be: every letter from D♭ upwards is used once, so the b5 cannot be written any other way.
These are also the notes of Em6/D♭. Which name is right depends on what is underneath and what came before — the notes alone do not decide.