Relationship between direct and collateral blood relatives?

No way. There are two algorithms, one Roman law affinity:

This method of calculating direct blood relatives: using the algebra as the standard to calculate the number of relatives up or down to the number of generations at intervals to determine their affinity.

Calculation method of collateral blood relatives: the first step is to find the cognate of both sides, and the second step is to count up or down from both sides to their own cognate people, and each generation is a relative.

In the third part, add the affinity of the second step, that is, the affinity of one's own body and the referent.

Second, the affinity system of the monastic law.

The algorithm for direct blood relatives is the same as above.

Algorithm of collateral consanguinity: The first step is to find the cognate of both parties.

Step 2, same as step 2.

In the third step, if the affinity number on both sides is the same, the equal number is the affinity number. If the genera on both sides are different, the number of affinities will be the more.

China roughly adopts the affinity calculation system of the monastic method, but it is enough to add one more generation to the direct blood relatives.

From this we can see that you are within three generations.

Collateral blood relatives: Relatives who are directly related by blood, collateral blood relatives: Relatives who are not directly related to blood relatives and are of the same origin as themselves, such as between brothers and sisters, between cousins and sisters, between themselves and uncles, aunts, uncles, aunts, etc., are all collateral blood relatives.

No, you and your father's cousin's daughter are the second generation, your father and your father's cousin are the first generation, and close relatives cannot marry within three generations, even if you and your father's cousin's daughter have children, you still can't get married.

Yes, there are four generations of collateral blood relatives.

Three generations of collateral and cannot be married.

Legal Analysis: Immediate family refers to persons who have a direct blood relationship or marriage relationship with themselves, that is, direct blood relatives and direct in-laws, such as spouses, parents, children, grandparents (maternal grandparents), grandchildren (maternal grandchildren). Collateral relatives are people who are of the same blood as themselves in descent other than the immediate family and their spouses, such as siblings, uncles, aunts, uncles, aunts, etc.

Legal basis: Article 1045 of the Civil Code of the People's Republic of China: Relatives include spouses, blood relatives and in-laws.

Spouses, parents, children, siblings, grandparents, grandchildren, and grandchildren are close relatives. Spouses, parents, children and other close relatives living together are family members.

Legal analysis: Immediate blood relatives refer to relatives who are directly related, and the biological parents and grandparents (maternal grandparents) from themselves up are all direct blood relatives of the elders. The biological children, grandchildren, and grandchildren from the bottom of oneself are all direct blood relatives of the younger generation, and they are relatives of the same blood relationship as themselves.

Brothers and sisters, uncles, uncles, aunts, nephews, nephews, etc., these peers, elders, and juniors are all collateral blood relatives.

Legal basis: Article 1048 of the Civil Code of the People's Republic of China Marriage is prohibited for lineal blood relatives or collateral blood relatives within three generations.

Legal analysis: Immediate blood relatives refer to relatives who are directly related to themselves (with a relationship between birth and birth). This includes giving birth to one's own elders (parents, grandparents, maternal grandparents, and higher elders) and one's own younger children (children, grandchildren, maternal grandchildren, and the immediate younger ones).

Collateral blood relatives are relative to direct blood relatives, which refers to relatives who are indirectly related to themselves, that is, blood relatives who are of the same origin as themselves in addition to direct blood relatives.

According to the provisions of China's Civil Code, lineal blood relatives and collateral blood relatives within three generations are not allowed to marry.

Legal basis: Article 1048 of the Civil Code prohibits marriage between direct blood relatives or collateral blood relatives within three generations.

Legal analysis: lineal blood relatives refer to relatives who have a direct blood relationship with themselves, and have a relationship between birth and birth. According to the reason for the occurrence of kinship, relatives can be divided into three categories: spouse, blood relatives and in-laws.

Collateral blood relatives are relative to direct blood relatives, which refers to relatives who have indirect blood relations with themselves, that is, blood relatives who are from the same source as themselves in addition to direct blood relatives.

Legal basis: Article 1128 of the Civil Code of the People's Republic of China Where the children of the decedent die before the decedent, the direct descendants of the decedent's children shall inherit by subrogation. If the siblings of the successor die before the decedent, the children of the decedent's siblings shall inherit by subrogation.

Subrogated heirs can generally only inherit the share of the estate to which the subrogated heir is entitled.

Lineal consanguinity: Lineal blood relatives in the legal sense include two situations, one is relatives who are from the same ancestor and have natural blood ties, such as grandparents, parents, children, etc.; The second type refers to the fact that there is no natural blood relationship, but the status of the adoptive parent is legally equal to that of blood relative, such as the relationship between adoptive parents and adoptive children is equivalent to direct blood relative, which is roughly called legal fiction of direct blood relative.

Collateral consanguinity within three generations: Collateral consanguinity refers to relatives with indirect consanguinity, that is, non-direct consanguinity from the same ancestor, such as siblings, cousins, cousins, uncles and aunts, nieces, nieces, etc. The so-called "within three generations" is counting from oneself upwards, oneself is the first generation, to the parents are the second generation of Nazhen, to the grandparents and grandparents are the third generation; Counting down from oneself, oneself is the first generation, to the second generation of children, and to the third generation of grandchildren and grandchildren.

Blood relatives other than direct blood relatives within three yards of high generations are collateral blood relatives within three generations.