The Spanish word 'puto' comes from Latin 'putus' meaning 'boy' or 'child'. This evolved into the Vulgar Latin forms 'puttus' (masculine) and 'putta' (feminine), still maintaining the meaning of 'boy/girl' or 'child'. In Spanish, the word underwent a significant semantic shift to take on its current pejorative meaning referring to a male prostitute. This kind of semantic deterioration, where a neutral word takes on a negative meaning over time, is relatively common in language evolution.

A related Spanish word is 'puta' (feminine form), which follows a similar etymology and semantic development pattern. Both words demonstrate how terms that originally simply meant 'boy' or 'girl' in Latin developed negative connotations over time in Spanish.

While there aren't any common English words directly related to this etymology, it's worth noting that English borrowed the Spanish word 'puta' in some contexts, though it's considered very vulgar and offensive. The semantic development from 'child' to its current meaning represents a historical pattern that can be seen in various languages where neutral terms for young people sometimes develop pejorative meanings.