Tram is from the Vietnamese Trâm — hairpin, ornament. Đặng Thuỳ Trâm (1942-1970) was a Vietnamese doctor + war diarist + author of Last Night I Dreamed of Peace (Nhật ký Đặng Thuỳ Trâm, 2005) — widely considered the Vietnamese counterpart to Anne Frank's Diary. Her diaries were preserved by American serviceman Frederic Whitehurst for 35 years before return + publication. Subject of 2009 film Đừng Đốt (Don't Burn).
Tram 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 Tram reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.