Mountain range or saw-toothed
Serria is a rare variant of Sierra, which is the Spanish word for a mountain range. It specifically refers to the jagged, saw-toothed appearance of mountain peaks. While Sierra is a well-established nature name, the Serria spelling is an uncommon modern variation.
Less common today
Serria isn't in the latest US Top 1000. It last peaked at #6,559 in 1993.
US births per 5-year period, 1990βpresent (SSA data).