Combination of Santa (saint) and the suffix -asia
A modern American invention likely created by blending the Spanish or Italian word 'Santa', meaning saint, with the popular rhythmic suffix '-asia' found in names like Anastasia. It carries the connotation of holiness or purity through its prefix.
Less common today
Santasia isn't in the latest US Top 1000. It last peaked at #6,153 in 2004.
US births per 5-year period, 1990βpresent (SSA data).