Out of the ten poruthams prescribed by South Indian Astrological rules, it is called as "Vasya Porutham".
Hindu Rashi/ Nakshatra Matching
In South India, Vasya Matching (Porutham) of the bride and groom. It is mostly done when the marriages are arranged by the families of the boy and the girl.
Importance of Vasya Porutham
Out of the ten poruthams, vasya porutham denotes compatibility between the zodiac signs of the couple that is to get married. Therefore, if there is agreement between their kootas, this enables mutual love and affection to be enhanced and to continue between the man and the wife. Strong physical attraction mutually between the husband and his wife is expected to exist together with mutual love, respect and cooperation.
Vasiya Poruthams helps the couple to develop more liking and intimacy with each other . Vasiyam also helps to create confidence and adjustability between the husband and wife. It is plus point in Nakshathra Porutham. Vasiya Porutham is decided by comparing the Rasi of the Girl and Boy.
Rashi - Vasiya rasi
Mesha (Aries) - Simha, Vrishika
Rishabh (Taurus) - Kadakam, Thulam
Mithun (Gemini) - Kanni
Kadakam (Cancer) - Vrichikam, thanusu
Simha (Leo) - Makaram
Kanni (Virgo) - Rishabam, Meenam
Thulam (Libra) - Makaram
Vrichikam (Scorpio) - Kadakam, Kanni
Tanush (Saggittarius) - Meenam
Makaram (Capricorn) - Kumbam
Kumbam (Aquarius) - Meenam
Meenam (Pisces) - Makaram
If bridegroom rasi becomes vasiya for a bride rasi, is uthamam or good match.
For example bride is Mesha rasi and bridegroom belongs to simha or vrishika it is uthamam
If bride rasi becomes vasiya for a given bridegroom rasi it is mathimam.
Otherwise no vasiya portham exits.