I would call the first chord, A-E-A-B-E, an Asus2, since the 3rd (C♯) is omitted, and there is a 2nd (B) included in the spelling.
The second chord could be a called a Bsus4 chord: B-F♯-B-B-E. Again, the 3rd (D♯) is omitted, and the 4th (E) is included.
Given a root of D♭, the final chord is a D♭m7: D♭-A♭-D♭-C♭-F♭, with a minor 3rd (F♭) and a minor 7th (C♭). Note that here F♭ is used instead of the enharmonic spelling E, and C♭ is used instead of the enharmonic spelling B. But it is more likely that this would be called a C♯m7 in practice. This chord is likely to be found in context as a ii7, a vi7, or a i7 chord; for a D♭m7 these would belong to the keys of C♭, F♭, and D♭ minor, respectively. But these keys are more likely to be written as their enharmonic equivalents B, E, and C♯ minor. In these keys the chord would be a C♯m7: C♯-G♯-C♯-B-E.