Just, righteous, or fair
Jastin is a modern phonetic variant of the Latin name Justin. It is derived from the Roman name Justinus, which itself comes from Justus, meaning upright or lawful.
Less common today
Jastin isn't in the latest US Top 1000. It last peaked at #5,748 in 2005.
US births per 5-year period, 1990βpresent (SSA data).