Yes. Lựu is the name of a kind of fruit in Vietnam and also a girl name. You can catch this name with those who come from countrysides and the elderly. Nowadays, Luu is not famous in Vietnam. Why? Because it is not really a good name and cute name for a girl. In fact, Vietnamese name usually includes its meaning, for instance: Thành Công means success, Mỹ Linh means cute,… and Lựu means a quite ugly fruit ????, so that Vietnamese modern parents don't give that to their kids.
Hope it helps