Short form of Anastasia, from Greek 'anastasis' meaning resurrection.
Stasia is a melodic diminutive of Anastasia, whose Greek root, anastasis, means resurrection or rising up — from ana (again, anew) and stasis (standing). The name has deep spiritual resonance in Eastern Christianity: Saint Anastasia was a Roman martyr of the early fourth century venerated across the Byzantine world, and the name became richly popular throughout Orthodox cultures from Greece to Russia to Eastern Europe. In the Russian imperial family, it was the name of the youngest daughter of Tsar Nicholas II, Anastasia Romanov, whose fate at Yekaterinburg in 1918 and the subsequent legends of survival made the name a touchstone of twentieth-century tragedy and mystery.
As a standalone name, Stasia strips away the formal grandeur of Anastasia and offers something sprightly and warm. It has a folk quality — the kind of name that might belong to a grandmother in a village in Poland or a young girl in a Greek island village — and this earthiness is part of its charm. It exists in a similar register to Sasha or Tasha, intimate and affectionate, yet not derivative.
In contemporary naming culture, where longer names like Anastasia are embraced in full on birth certificates but shortened to something friendlier for daily use, Stasia occupies an interesting middle ground: it's short enough to stand alone, yet immediately evokes its magnificent source name. Parents who find Anastasia too sweeping for daily use, or who simply love the sound without the full formal weight, find in Stasia exactly the right balance — nimble and bright, with centuries of meaning quietly behind it.