Achai is of Hebrew origin, meaning 'brother'. It is derived from the Hebrew word 'ach', which translates to 'brother' in English. This name has a warm and familial feel due to its direct association with siblinghood. Achai is also found among some African cultures, particularly in Kenya, where it is used as an independent given name rather than a derivative of others.
Achai had no recorded births in any year prior to 2007, when it suddenly gained popularity with six babies being named Achai that year. Overall, there have been six individuals named Achai since records began.