Dennahan Family History

You can see how Dennahan families moved over time by selecting different census years. The Dennahan family name was found in the USA in 1920. In 1920 there was 1 Dennahan family living in Illinois. This was about 50% of all the recorded Dennahan's in USA. Illinois and 1 other state had the highest population of Dennahan families in 1920.

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