St. Arsenius (or Arsenios) the Great was a 5th-century Roman saint remembered for his influence on asceticism.

Sibyll is a rare feminine name that serves as a variant spelling of Sibyl or Sybil, derived from the Greek word 'sibylla,' meaning 'prophetess.' In ancient Greek and Roman culture, sibyls were women believed to possess prophetic powers and served as oracles. This unique spelling adds distinction to an already uncommon name while maintaining its mystical heritage. Throughout history, the name has been associated with wisdom, foresight, and spiritual insight. Sibyll has never been widely used, giving it an air of mystery and uniqueness. The name carries intellectual and literary connotations through references in works ranging from classical literature to T.S. Eliot's poetry. For parents seeking a name with depth, historical significance, and uncommon status, Sibyll offers a distinctive choice with ancient roots.