The Spanish word 'ovejita' meaning 'little sheep' or 'lamb' has its roots in Latin. It starts with the Latin word 'ovis' meaning 'sheep', which developed into the diminutive form 'ovicula' meaning 'little sheep' in Latin. This evolved into the Spanish word 'oveja' (meaning 'sheep'), and then the modern Spanish diminutive suffix '-ita' was added to form 'ovejita', creating an endearing term for a small sheep or lamb.

The most obvious related Spanish word is 'oveja' meaning 'sheep', which is the base word from which 'ovejita' is formed. The suffix '-ita' is a very common diminutive in Spanish that makes words smaller or more endearing, like in other pairs such as casa/casita (house/little house) or perro/perrito (dog/little dog).

While English doesn't have many common modern words directly related to 'ovejita', we do have some scientific terms that come from the same Latin root 'ovis'. These include 'ovine' meaning 'relating to sheep' and 'oviform' meaning 'egg-shaped' or 'oval' (as sheep were associated with their rounded shape). The word 'oval' itself, while having evolved to describe a shape rather than sheep, shares this ancient connection to sheep through Latin.