Stephan Kekulé von Stradonitz
Stephan Kekulé von Stradonitz, was a German lawyer, heraldist and genealogist who popularized a genealogical numbering system of ancestors.
Stephan was the son of the prominent chemist Friedrich August Kekulé von Stradonitz, who had been ennobled during his lifetime, and his Belgian wife Stéphanie Drory.
In 1898 Kekulé von Stradonitz published his interpretation of Eytzinger's and Sosa's method in his Ahnentafel-Atlas. Ahnentafeln zu 32 Ahnen der Regenten Europas und ihrer Gemahlinnen, Berlin: J. A. Stargardt, 1898–1904, containing 79 charts of the sovereigns of Europe and their wives. This method became the most common method of numbering ancestors and is known as the Sosa–Stradonitz Method or Ahnentafel.
