The Spanish word 'zurrón' (meaning 'leather bag') comes from the Basque word 'zorro' meaning 'sack', combined with the Spanish augmentative suffix '-ón'. The augmentative suffix '-ón' typically indicates something large or increased in size, so 'zurrón' essentially means 'large sack' or 'big bag', which evolved to specifically refer to a leather bag or pouch.

While not directly related, it's worth noting that the Spanish word 'zorra' (meaning 'fox') is also believed to have Basque origins, though from a different root. The similarity is coincidental.

There aren't any common English words directly related to 'zurrón', as it comes from Basque, which is a language isolate (meaning it's not related to Indo-European languages like English and Spanish). However, English speakers might find it helpful to remember that it refers to a type of bag or sack, similar to how we might use 'satchel' or 'pouch'.