Main country
United States
396 people
95.7% of total
Surname
Koelker
414 worldwide · 3 countries
414
Total population
3
Countries
1 in every 19,565,217
Frequency
Rarity
Rare
Dispersion
Local
Top countries
1
United States
396
95.7%
2
Germany
17
4.1%
3
Iceland
1
0.2%
World distribution
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