Trethian Family History

You can see how Trethian families moved over time by selecting different census years. The Trethian family name was found in the USA in 1880. In 1880 there were 3 Trethian families living in Wisconsin. This was 100% of all the recorded Trethian's in USA. Wisconsin had the highest population of Trethian families in 1880.

Use census records and voter lists to see where families with the Trethian surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.