Fórmula para cálculo de parentesco

GeneaFloripa

What is the mathematical formula to calculate the relationship between 2 people?

Qual a fórmula matemática para calcular o parentesco entre 2 pessoas

Julia Szent-Györgyi

Um, there isn't one?

There are various tools for figuring out "nth cousin m times removed", but there aren't really any formulas involved, only diagrams (sometimes). I find it easiest to just chart it out myself, though.

For example, I recently found my father's second cousin, and sent him a version of the following chart:

                      Paulovkin Mária

                             |

                  ----------------------

(half-)           |                    |

siblings   Paulovkin Zsuzsanna    Pohánka Mária

                  |                    |

cousins     Selmeczy Erzsébet     Makovínyi Pál

                  |                    |

2nd cousins   Palotay Csaba       [new cousin]

                  |

                 [me]

(All names are of deceased people.)

In English, our relationship is "second cousins once removed", but I was writing in Hungarian, which doesn't use the "removed" formulation, so I phrased it as "my father's second cousin". If you're using a language that does use an equivalent of "removed" for generational differences, then the degree of cousinship is counted to the person who is closer to the common ancestor(s), and the number of generations needed to get to the other person is the number of times removed.

Since in English further ancestors just get another "great" tacked on, there are people who use "formulas" based on the number of greats to figure out degree of cousinship, but I find it too easy to get confused between the different numberings (one for the number of greats, another in the opposite direction for the degree of cousinship, and a third for the generational offset). Plus, in Hungarian, everyone past your 3ggp is just your ancestor; there aren't any more words for it.

GeneaFloripa

Dear Julia,

Good evening!

Thank you for answering my question. It's a bit personal, but I'm curious.
Thank you also for the examples you used.
I've worked with several languages ​​(clipper, delphi, csharp, vba, javascript and python), but nothing for genealogy.
Since I love working with Excel, I thought about creating a function to find out the relationship (in vba).
I already use the Familysearch website and application, among others, but I'm curious, so I'd like to know which formula you use.
I live in Brazil and I thought it would be really cool to be able to contact people from other countries, because, from a certain generation of ancestor, we are all "related".
Happy New Year to you!
If you want to continue our contact, you can use the email (email removed)

My name is (name removed)

Ashlee C.

@GeneaFloripa Mod note: Community is a public online forum. For your privacy, your post was edited to remove a name that is not part of your username as well as your contact information. Please see the Community Code of Conduct for more details.

Julia Szent-Györgyi

People have probably already done relationship "calculators" using every computer language ever invented, but that shouldn't stop you from doing one for your own amusement.

If [Common Ancestor] is [Person A]'s (N)th-great-grandparent and [Person B]'s (N+M)th-great-grandparent, then [Person A] and [Person B] are (N+1)th cousins M times removed. If you display the results as an abbreviation (#C#R), then you don't need to deal with the different ordinal endings (-st, -nd, -rd, -th), but some translations will be needed: for this formula, N=0 is grandparents, N=-1 is parents, and 0th cousins are siblings. Oh, and a 0C1R is an aunt/uncle or niece/nephew.

GeneaFloripa

Julia,

Good afternoon!

Thank you very much for your guidance. I will try to adapt to VBA.

Have a happy new year and many achievements in your life.

One day I will visit Hungary, because they say it was the Huns who "founded it". and Attila the Hun is my grandfather 52.

Big hug!

Julia Szent-Györgyi

While the Hungarian legends do claim a relationship between the Huns and the Magyars, modern-day Hungary wasn't founded by Attila — the honfoglalás ("claiming of a homeland") happened more than 400 years after his death.

Any genealogy claiming descent from Attila needs to be taken with several grains of salt. Everything we "know" about him comes from writings that by modern standards would barely count as historical fiction.