How to calculate the third generation collateral blood relatives?

Collateral blood relatives within three generations refer to collateral blood relatives from grandparents (relative to their own bodies). Regardless of peers or non-peers, as long as they are collateral blood relatives from grandparents to grandparents, they are collateral blood relatives within three generations. Brothers and sisters, cousins and cousins are of the same generation; There are uncles, aunts, nephews, uncles, aunts and nephews. In China, the second generation entity calculation method is used to calculate the parent-child relationship. Immediate family members are the closest people: the previous generation is parents and the next generation is children. Then, the upward direct third generation is grandparents, and the downward direct third generation is granddaughter, which belongs to the direct blood relatives within three generations. The calculation of collateral blood relatives within three generations is based on the person, from two collateral blood relatives to two homologous blood relatives, namely aunt, uncle, cousin and cousin; Uncle, uncle, aunt, niece, niece and nephew all belong to collateral blood relatives within three generations.

Legal basis:

People's Republic of China (PRC) Civil Code

Article 1045th Relatives include spouses, blood relatives and in-laws.

Spouse, parents, children, brothers and sisters, grandparents, grandparents, grandchildren and grandchildren are close relatives.

Close relatives such as spouses, parents and children living together are family members.

Article 1046 Marriage shall be voluntary by both men and women, and it is forbidden for either party to force the other, and no organization or individual may interfere.

Article 1047 The age of marriage shall not be earlier than 22 for men and 20 for women.

1048th lineal blood relatives or collateral blood relatives within three generations are prohibited from getting married.

Article 105 1 The marriage is invalid in any of the following circumstances:

(1) Bigamy;

(2) Having a family relationship that prohibits marriage;

(three) did not reach the legal age for marriage.

Derivative problem:

Can collateral blood relatives get married within three generations?

Collateral blood relatives cannot get married within three generations, because according to the provisions of the Civil Code of People's Republic of China (PRC), it is absolutely forbidden for lineal blood relatives or collateral blood relatives to get married within three generations. In addition, lineal blood relatives, including parents and children, grandparents, grandparents, grandchildren and grandchildren, are not allowed to get married.