The Spanish word 'chivito' meaning 'little goat' comes from 'chivo' (meaning 'young goat') combined with the diminutive suffix '-ito'. The word 'chivo' itself derives from 'chib', which was a call or sound used to summon goats in Spanish. This is an interesting example of how an onomatopoeic or imitative sound used to call animals evolved into a formal noun for the animal itself, and then was further modified with a diminutive suffix to create an even more specific term.

The most obvious related Spanish word is 'chivo' meaning 'young goat' or 'kid', which is the base word from which 'chivito' is derived. The suffix '-ito' is an extremely common diminutive in Spanish that you'll see in many words like 'perrito' (little dog), 'gatito' (little cat), and 'casita' (little house).

While there aren't direct English cognates for 'chivito', it's worth noting that English also sometimes derives animal names from the sounds used to call them, such as 'kitty' coming from 'kit', a call used for cats. However, this is a parallel development rather than a direct etymological connection.