Pure
Kateria is a rare elaboration of Katherine, likely influenced by the phonetics of names like Valeria or Katerina. It shares the same etymological root as the Greek 'katharos', meaning pure, which has been a staple of Western naming for centuries.
Less common today
Kateria isn't in the latest US Top 1000. It last peaked at #5,560 in 1999.
US births per 5-year period, 1990βpresent (SSA data).