The traveler; from the river Trent
Trentan is a modern variant of the English name Trenton. It originally derived from a habitational surname referring to the town in New Jersey or the river Trent in England, which itself likely comes from a Celtic word meaning 'strongly flooding'.
Less common today
Trentan isn't in the latest US Top 1000. It last peaked at #5,993 in 2009.
US births per 5-year period, 1990βpresent (SSA data).