Trent is from the Old English place name — referring to the River Trent in England (from a Celtic root meaning "the trespasser, flooder"). Stoke-on-Trent — English city.
Trent does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Trent reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.