Fifth
Quintan is a variant of the Latin name Quintus or Quentin, traditionally given to the fifth child or a child born in the fifth month. While less common than Quentin, it maintains a structured, numerical heritage.
Less common today
Quintan isn't in the latest US Top 1000. It last peaked at #4,338 in 1996.
US births per 5-year period, 1990βpresent (SSA data).