Eight (ashta) types of wedding (vivaha), named after divine and demonic beings.
Daiva Vivaha (Deva wedding)
The daughter is married to a priest as the gift to him for having performed sacrificial ceremonies for the family. The daughter is part of the sacrifice.
Arsha Vivaha (Rishi wedding)
The daughter is married for a bride price.
The daughter is married without a bride price.
An unsuitable groom buys the daughter from the family.
Forced marriage if the daughter is pregnant.