Lady or princess
Seidy is a modern phonetic variant of Sadie, which originated as a diminutive of the Hebrew name Sarah. It carries the same traditional meaning of 'lady', 'princess', or 'noblewoman'. While Sarah is a foundational biblical name, this specific spelling is a contemporary creative choice.
Fewer than 5 girls were named Seidy in 2025.
US births per 5-year period, 1990–present (SSA data).
