Internet platform for digital ancestry research

In previous research on the family surname Kühl / Kühlen births and / or deaths were determined before 1720 in the localities shown below. There were filtered out all localities where events such as births and deaths were first detected only after 1720 to represent only the regions of origin. The map displays in addition to location information also the year of initial detection of a birth or death of a place and their total number, divided by number of births and number of deaths (eg 1646-64-9). Locations marked with red icons births and / or deaths occurred particularly often.