The Spanish word 'garzo', meaning 'blue-eyed', has an uncertain etymology. Historical linguists have not been able to definitively trace its origins to any specific source language or root word.

Due to the uncertain etymology of 'garzo', it's difficult to identify with certainty any simpler Spanish words that share its origins.

Since the etymology of 'garzo' is unknown, we cannot confidently identify any English words that share its historical origins.