Possibly a short form of Marcella or Griselda, or from a Germanic element meaning blessed or happy.
Zella is one of those names whose charm exceeds the certainty of its origin. It has been explained in several ways: as a short form of names ending in -zella or -ella, as a relative of Marcella or Griselda, and sometimes as connected with older Germanic naming patterns. In the United States it also appears in records from the nineteenth century as a stand-alone given name, which suggests it had already become independent rather than merely a nickname.
That soft z sound, uncommon in older English names, gave Zella a bright, slightly exotic quality from the beginning. Historically, Zella enjoyed modest use in the late nineteenth and early twentieth centuries, especially in America, where many distinctive feminine names blossomed during that period. It belonged to a generation of names that sounded ornamental yet sturdy, at home beside Della, Stella, Lula, and Zelda.
It never became overwhelmingly common, which may be why it feels vivid again today: it has vintage roots without feeling overfamiliar. The name also inevitably invites comparison with Zelda, a literary and cultural name linked to F. Scott Fitzgerald's wife Zelda Fitzgerald, though Zella has always had a gentler, less theatrical profile.
In contemporary perception, Zella feels both antique and crisp. It carries the atmosphere of old family albums, handwritten signatures, and turn-of-the-century America, yet its sound aligns neatly with modern taste for short, distinctive names. The literary associations are indirect rather than canonical, but that can be an advantage: Zella feels suggestive, not overdetermined. It is a name with historical dust on it, but the kind that glints in the light.