Answer:
(Fatwa: 120/120=M/1429)
We could not find any source to believe that Radheen is the name of a door of Jannah. It is better for you to name your daughter as: Radhiya (راضیہ).
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
