Contents - Index - Previous - Next

The d'Aboville System is similar to the Henry Numbering System, except that each digit (or group of two digits for numbers larger than 10) is separated by a period.

The d'Aboville System is available on the Descendant Chart report.

The starting person is given the number 1. His first child is numbered 1.1, his second child is 1.2, his third child is 1.3, etc. The children of 1.2 are 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, etc. Each person's number starts with his parent's number and adds a digit to represent his position in the family. Thus if a person has the number 1.4.2.8.3.5, he is in the sixth generation (there are six groups of digits), and he is the fifth child of the third child of the eighth child of the second child of the fourth child of the starting person.

If there are more than 9 children in a family the numbering continues on with double digits, 10, 11, etc. Thus person number 1.11.2.14 is in the fourth generation and is the 14th child of the second child of the 11th child of the starting person.

See also Henry Numbering System.

10-0209 : 20301 RK