Main country
Netherlands
498 people
76.1% of total
Surname
Koolstra
654 worldwide · 7 countries
654
Total population
7
Countries
1 in every 12,385,321
Frequency
Rarity
Rare
Dispersion
Local
Top countries
1
Netherlands
498
76.1%
2
United States
114
17.4%
3
Australia
26
4%
4
Canada
11
1.7%
5
Germany
3
0.5%
World distribution
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