We are aware that our Surname changed from Fitzpatrick to Fitchpatrick in the middle to late 1800's. Our GGGGrandpa John Fitzpatrick came to the US ( Detroit ) from Ireland in 1816, he was 4 yrs of age.(roughly) He had 6 children and 2 definite marriages and a possible 3rd all between 1837 and 1889. We know his first child was born on or about December 20, 1840-1845 in Iowa, died in Knox County Illinois in November of 1926. His name was William he was my GGGrandpa and then he had children and William's son John Born 1897 and Died in 1923 was my GGrandpa Then we know he was in Tazwell County, Illinois on or about 1853. If anybody has any information on the Time Line of my GGGGrandpa John's life before he left Ireland (family members names) and after he left please post.