Jastin is of American origin, derived from the Latin 'Justinian', which was borne by several early emperors of the Byzantine Empire. It has gained popularity as a modern variant of Justin, which has been widely used throughout history and across various cultures.
"Jastin has seen varied popularity over time, peaking between 2005 and 2010 with consistently high birth numbers. Since then, it has declined, with recent years showing a significant decrease, although there was a slight increase in 2023."