In western (American) culture there is no accepted description of any relation between them. They are simply referred to as 'in laws' of their child's spouse.
If the parents are absent, anyone related to the bride or groom does it instead, usually an older sister/brother or uncle/aunt.
The relationship between the bride and groom's parents are 'in-laws.' It's an extension of family through marriage.
NO
No, the mother of the bride does not give the groom or his parents a gift, but just gives a gift to her daughter and new son-in-law.
The parents of the bride are very hapy.
James & Jane Smith, parents of the bride and William Jones, Father of the Groom and Susan Jones, Stepmother of the groom. James & Jane Smith- Parents of the Bride William Jones- Father of the Groom Susan Jones- Stepmother of the Groom
Traditionally no. The bride and groom enter as Mr. & Mrs. followed by the wedding party and the parents can follow behind or go ahead and mingle with the guests before the bride and groom enter the wedding reception.
Most guests already know who the bride and grooms parents are and some weddings have a receiving line where guests congratulations the bride, groom and both sets of parents. If there is no receiving line then no, the bride and groom do not introduce their parents. The father's of either side may wish to make a toast to their new daughter-in-law or new son-in-law.
At Orthodox Jewish weddings, the groom is escorted by both fathers and the bride is escorted by both mothers. At modern Jewish weddings, the bride and groom are escorted by their parents.
It should most definitely be the bride and groom with consideration of the groom's parents' expenses. If the bride and groom don't show up, then there is no rehearsel dinner.
Traditionally, the bride's parents have paid for the wedding, but this is much less adhered to nowadays. It is quite OK for both sets of parents to contribute if a mutual arrangement is reached, or for the bride and groom to foot or partially foot the bill.
No, there is no reason that the groom's parents need give the bride an additional gift over and above the gift given to the bride and groom. Some mother-in-laws may have a special piece of jewelry they may want the bride to have, but that is the mother-in-laws choice.