Dear Jennifer, I don't have any information about the Jatho family in particular, but I do have a word of caution about the Census index. I couldn't find my Wenkel ancestors in the 1850 Census index (under any variation in spelling), even though I was pretty sure they were living in Monroe County at the time. It was only when I was looking up another branch of the family that I found the Wenkels living in Eagle Precinct (now Columbia precinct). It was quite by accident! If you have access to the 1850 Illinois Census, it would be worth browsing through it (especially in Waterloo, if you think that is where your family lived) to see if you can find them. I hope this information is useful! Good luck! Peggy P.S. I noticed that for Monroe County, but not for any other Illinois County I have looked at, the family numbers were not lined up with the "head of household", but instead with the last person in the family listed (I'm not sure if the appropriate number is the one on the line above the household head, or the one at the end of the household). The confusion probably came in because there were adults (usually men in their late teens/twenties) with other family names living in the same household. However, the household number in some cases is next to a small child or infant!