Now you want to include reference numbers to keep track of it all. This little presentation will attempt to unlock the secrets of these and other numbering systems. This is a rather straightforward system for numbering your direct ancestors . Here's how it works. Basically, the father is always twice the person's number and the mother is twice the number plus 1.
Fathers are always even numbers and mothers are always odd numbers.
Advantages First of all, the ahnentafel system is so widely used it is considered universal in the Genealogy community. Also, you can use this system for anyone's pedigree chart. You may want to print a chart using your Grandfather as number 1. Using the formula, the rest falls into place. Although related to you, these ancestors are not the direct progenitors of your line.