Why?
Primarily – Written family histories For some – filing systems
Systems
Ahnentafel (ON en TAH full) (ancestor table)
For numbering ancestors in a pedigree chart Base person is 1. Father is 2. Mother is 3. Any person’s (n) father is n x 2 and mother is n x 2 + 1 No numbers for anyone else If you want to sound extra geeky, call it the Sosa-Stradonitz System
Dollarhide (William Dollarhide)
Adds to Ahnentafel for other descendants Base person’s grandfather is 4.0. His siblings are 4.1, 4.2, 4.3 Has additional characters for step, half, second marriage, etc
Register (New England Historic and Genealogical Society Register)
For numbering descendants Only people with descendants get a number
NGSQ or Modified Register (National Genealogical Society Quarterly)
Henry (Reginald Henry)
Base person is 1. Children get parent’s number plus an extra digit at end (11, 12, 13, 111, 112, 113…) Problems with more than 9 kids! (some use X, A, B, C, some use (10))
D’Aboville (Jaques d’Aboville)
Used a lot in France Like Henry, but uses periods between generations (1, 1.1, 1.2, 1.1.1, 1.1.2…)
Meurgey de Tupigny (Jacues Muergey de Tupigny)
Generations get Roman numeral, individuals get numbers I, II-1, II-2, III-1, III-3
De Villiers/Pama
Like MdT but uses letters instead of Roman numerals A, B-1, B-2, B-1.C-1, B-1.C-2, B-2.C-3 Used in South Africa
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