Trethway Family History

You can see how Trethway families moved over time by selecting different census years. The Trethway family name was found in the USA in 1880. In 1880 there were 6 Trethway families living in Pennsylvania. This was 100% of all the recorded Trethway's in USA. Pennsylvania had the highest population of Trethway families in 1880.

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