In this system, ancestors are numbered continuously. Root person will be 1, father 2, mother 3, grandfather 4 and grandmother 5. The next generation get number from 8 to 16. Each generation starts with a number that also indicates how many ancestry it is of that generation. The first number of his generation is equal to the total number of people in that generation. The men get in this system an even number, which is double the child, while women get an odd number, which is double the child plus one.
It was the German genealogist Stephan Kekulé von Stradonitz (1863-1933) who in 1898 started using this system.
This system is similar to the previous one, but the difference is that the proband receives no own number. Therefore, father is 1 and mother 2 and so on. In addition, generations get Roman numerals, where the parent generation is referred to as Generation I, next generation II and so on. In this system, the men get odd numbers, while women get even.
This system uses the Rollers two numbers, a generation designation and a serial number within the generation. Generation identifier using Roman numerals, which begins with the parental generation and as serial number, Arabic numbers Root persons grandmother is therefore designated as II:2
There are several variants of this system: A variant starts generation designation with the root person. Another variation uses Roman numerals for both generation and serial number.
In his "Lehrbuck der Genealogy" uses Ottokar Lorenz (1832-1905), a system to denote ancestry. In this system, the grandfather mother becames 8/2. The first figure shows the number of people in this generation (parents 2, their parents 4 and their parents 8). The second number shows the position of the person from the "left." Men get odd numbers, while women get even, and the mother's number is the father plus one. One advantage of this system is that it easily shows if the ancestor belongs father side or mother. If the second number is less than or equal to half of the first number it belongs to the person father side.
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