Answer:
(Fatwa: 855/855=M/1429)
Trannum means: to sing, to make melodious sound. It is better to choose a better name.
Shirin means: sweet, soft, pleasant.
Shahin is a predatory white bird.
The last two names are alright.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
