Unknown; likely a modern American coinage
Ajada is a rare name with no established etymological history. It is likely a modern rhythmic invention, possibly influenced by names like Jada or Ada, or a variation of the Spanish word 'ajada' meaning garlic sauce, though the latter is unlikely to be the intended source for a given name.
Less common today
Ajada isn't in the latest US Top 1000. It last peaked at #8,971 in 2003.
US births per 5-year period, 1990βpresent (SSA data).