Losa

Losa is a Spanish surname derived from the common noun losa, meaning "tile" or "slab". As a toponymic or occupational surname, it likely originated as a name for someone who lived near a notable slab or rocky outcrop, or for a worker involved in quarrying or laying stone tiles. The surname is most concentrated in Spain, with historical records showing a particular presence in the northern regions such as Castile and León, as well as parts of Galicia.