The Meurgey de Tupigny System is a simple numbering method used for single surname studies and hereditary nobility line studies developed by Jacques Meurgey de Tupigny of the National Archives of France, published in 1953.
Each generation is identified by a Roman numeral (I, II, III, ...), and each child and cousin in the same generation carrying the same surname is identified by an Arabic numeral. The numbering system usually appears on or in conjunction with a pedigree chart. Example:
The general description of the Meurgey de Tupigny System at the top of the page, and the sample generic chart on the left above is adapted from Wikipedia: Genealogical Numbering Systems. The sample Higdon chart on the right is adapted from the genealogical register report starting on page 263 of Descendants of John Higdon and Millicent 1657-1998, by Gena Lee Theiss.
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