Editing Ahnentafel (section)

===First method===

Use the definition that a father's number will be twice that individual's number, or a mother's will be twice plus one, and just multiply and add 1 accordingly. For instance, someone can find out what number [[Sophia of Hanover]] would be on an ahnentafel of [[Peter Phillips]] (son of [[Anne, Princess Royal|Princess Anne]] and grandson of [[Elizabeth II]]). Sophia is Phillips's mother's mother's [[George VI|father]]'s [[George V|father]]'s [[Edward VII|father]]'s [[Queen Victoria|mother]]'s [[Prince Edward, Duke of Kent and Strathearn|father]]'s [[George III of the United Kingdom|father]]'s [[Frederick, Prince of Wales|father]]'s [[George II of Great Britain|father]]'s [[George I of Great Britain|father]]'s [[Sophia of Hanover|mother]]. So, we multiply and add:

:1×2&nbsp;+&nbsp;1&nbsp;=&nbsp;3
::3×2&nbsp;+&nbsp;1&nbsp;=&nbsp;7
:::7×2&nbsp;=&nbsp;14
::::14×2&nbsp;=&nbsp;28
:::::28×2&nbsp;=&nbsp;56
::::::56×2&nbsp;+&nbsp;1&nbsp;=&nbsp;113
:::::::113×2&nbsp;=&nbsp;226
::::::::226×2&nbsp;=&nbsp;452
:::::::::452×2&nbsp;=&nbsp;904
::::::::::904×2&nbsp;=&nbsp;1808
:::::::::::1808×2&nbsp;=&nbsp;3616
::::::::::::3616×2&nbsp;+&nbsp;1&nbsp;=&nbsp;'''7233'''

Thus, if we were to make an ahnentafel for Peter Phillips, Electress Sophia would be #7233, among other numbers due to [[royal intermarriage]] causing [[pedigree collapse]]. (See [[#Multiple numbers for the same person]] below.)