Just, upright, or righteous
Jusitn is a rare spelling variation of the name Justin. It is derived from the Latin name Justinus, which itself comes from Justus, meaning fair or law-abiding. While Justin was a dominant name in the late 20th century, this specific transposition of letters is extremely uncommon.
Less common today
Jusitn isn't in the latest US Top 1000. It last peaked at #4,402 in 1991.
US births per 5-year period, 1990βpresent (SSA data).