The star matching (ashtakoot milan) for marriage uses the Moon's nakshatra in the boy and girl's horoscope. Nakshatra milan is one step in overall kundli milan.
Nakshatra matching for marriage gives an overview of Ashtakoot Milan for marriage
Use Kundali Matching Calculator to find Dosha matching etc with Ashtakoot Milan
Use Horoscope by date of birth to find the star of the boy and girl
Caution: Nakshatra Matching plays a small part, say 10%, in Marriage Matching. Ashtakoot Guna Milan is one of 5-7 steps in the overall Kundali Matching| Kundli Milan compatibility assessment.
Star Matching for a happy marriage, a study of 30+ couples' marriage throws more light on this
Use Nakshatra Porutham Calculator, for Tamil / South Indian porutham calculation
