Sierra, of Spanish origin, translates to 'mountain range' or 'sawtooth mountain'. This unisex name gained popularity in the latter half of the 20th century, often used as a feminine variation of Sierra Madre, a mountain range in Mexico and the United States. It offers a unique balance between being distinctive yet approachable.
"Over two decades, the name Sierra experienced peaks and valleys in popularity. The most notable peak was in 2000 with 20 births, while the lowest occurred in 1985 and 2001 with just 5 births each. Overall, there were 225 babies named Sierra between 1985 and 2007."