Estella is the Latin and Spanish form of Stella — from the Latin stella, meaning "star." The Italian Estela carries the same root.
Charles Dickens's Great Expectations (1861) features Estella as the beautiful, cold ward of Miss Havisham, beloved by Pip. The character has fascinated readers for over 160 years. Today Estella sits in the U.S. top 500 and is rising.
Estella reduces to one — the number of singular starlight.