2025 Ancestor Score Completeness Statistics

Geneanet defines the Ancestor Score as 

“comparing the number of possible ancestors with 

the number of identified ancestors on a 10-generation report”. 

Inspired by the Ancestor Score - or “Completeness Statistics” - of other blogs, and GeneaNet's definition above, I generated my first one in February 2016. Since then I haven't just been able to linearly increase my known ancestors. Instead, I had to remove a whole line of wrong ancestors in 2018. Since then I've managed to add new ancestors - mostly thanks to publications by others about people who were living before 1700. Published transcriptions also helped to find additional ancestors.

Currently, I have identified 5700 different ancestors.

Composition and Bandwidth of various Generations
Gen	Composition												Bandwidth **
	Men	Wom.	Total	% 2025	% 2024	% 2023	% 2022	% 2021	% 2020	% 2019	% 2018*	% 2016	From	Until
G 3	2	2	4	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	1892	1906
G 4	4	4	8	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	1850	1880
G 5	8	8	16	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	1804	1857
G 6	16	16	32	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	1756	1832
G 7	30	30	60	93,8	93.8	93.8	93.8	93.8	93.8	93.8	93.8	93.8	1724	1802
G 8	59	59	118	92.2	92.2	92.2	92.2	92.2	92.2	92.2	92.2	90.6	1680	1777
G 9	114	113	227	88.7	88.7	88.7	88.7	88.7	88.7	88.7	88.3	86.7	1645	1749
G 10	208	202	410	80.1	79.9	79.9	79.9	79.7	79.7	79.5	78.7	76.4	1600	1722
G 11	344	318	662	64.7	64.5	64.5	64.4	62.4	61.8	61.2	60.8	57.0	1560	1695
G 12	454	394	848	41.4	41.4	41.0	41.0	39.0	38.4	37.6	37.3	33.8	1510	1666
G 13	491	373	864	21.1	21.0	20.8	20.6	19.0	18.7	18.1	17.9	15.7	1505	1645
G 14	451	313	764	9.3	9.3	9.2	9.0	7.6	7.3	7.0	7.1	6.1	1440	1625
G 15	346	225	571	3.5	3.4	3.3	3.2	2.5	2.3	2.0	2.0	1.6	1440	1580
G 16	216	128	344	1.1	1.0	1.0	1.0	0.7	0.6	0.6	0.6	0.5	1395	1540
G 17	120	64	184	0.3	0.3	0.3	0.2	0.2	0.2	0.2	0.2	0.1	1365	1510
G 18	77	41	118	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.0	1335	1470

     *) The years 2016, 2019 and 2020 feature an ancestor score of February, 2018 has an August score, 2021 and 2022 have a January score.

   **) The Bandwidth of a generation is determined by the earliest and latest known birth or baptism date within that generation.

   ***) I have many ancestors in places like Sint Anthoniepolder, 's-Gravendeel, Wieldrecht and Hendrik-Ido-Ambacht, where pre-1800 baptism records are (mostly) missing.

Further Reading: Geneanet's Ancestor Score Definition, Equivalent Complete Generations, Identical Ancestors Point, Coefficient Of Relationship, Gender Ration, Completeness Index.