The Spanish word 'bávaro' meaning 'Bavarian' comes directly from the Latin word 'Bavarus', which also meant 'Bavarian'. This is a straightforward borrowing that maintained both its form and meaning, referring to someone or something from Bavaria, a region in modern-day Germany.

There aren't many common Spanish words that are etymologically related to 'bávaro', as it's a fairly specific geographical term that entered Spanish directly from Latin.

English speakers might recognize the similarity to the English word 'Bavaria' and 'Bavarian', which share the same Latin origin. While English uses 'Bavarian', Spanish uses 'bávaro' to refer to the same concept - something or someone from Bavaria.