Little Saint John
A Spanish diminutive form of San Juan, specifically referring to Saint John. It is a traditional devotional name often used in Mexican-American communities to honor Saint John the Baptist.
Less common today
Sanjuanita isn't in the latest US Top 1000. It last peaked at #2,539 in 1990.
US births per 5-year period, 1990βpresent (SSA data).