Thiên is a Vietnamese word which can refer to:
Thiền, a Vietnamese version of Zen Buddhism
People Lê Hoàng Thiên Mẫu Thượng Thiên Quốc Thiên Thiên Y A Na Thừa Thiên (empress) Thuận Thiên (Trần dynasty empress) Thuận Thiên (Nguyễn dynasty empress)
See also
Thien (disambiguation) Thiene Thoen (disambiguation)