Trấn was born in 1805. Trấn's father was Tuyên and his mother was Chi Nghiêm. His paternal grandparents were Hòa and Chuyên Nguyễn. He had three brothers and two sisters, named Đắc, Thấp, Nhang, Lang and Thang. He died due to giỗ 28/3 âm lịch at the age of 61 in 1872. He was buried in Đống Mưỡu.