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Where is the Ploen family from?
You can see how Ploen families moved over time by selecting different census years. The Ploen family name was found in the USA, the UK, and Scotland between 1871 and 1920. The most Ploen families were found in the USA in 1920. In 1880 there were 9 Ploen families living in Iowa. This was about 69% of all the recorded Ploen's in the USA. Iowa had the highest population of Ploen families in 1880.
Use census records and voter lists to see where families with the Ploen surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.