How the name letter is found
Each of the 27 nakshatras is split into four padas, and each pada has a traditional starting syllable: Ashwini’s are Chu, Che, Cho and La, for example. The baby’s letter is the one for the pada the Moon was in at birth.
The Moon crosses a pada in about six hours, so the birth time matters. Without it we show all four letters of the star, and tell you if the Moon changed stars that day.
The syllables are the common Hindi and Sanskrit list; Tamil, Telugu and other regional lists differ a little, so many families confirm with their priest at the namkaran.