Your wrote <Their first child, *William*? was born 1897 in Ill. and must have died before 1910, so perhaps in Ill?> I would guess that the William shown in the 1900 Census is the Bella shown in the 1910 Census. I had an uncle originally named Bella but he went by William. Probably the 1900 or 1910 Census is in error as far as his birth place is concerned. In 1900 Paul and Dora/Boro had a total of two children both living. These were William and John. Between the 1900 and 1910 Census, they had seven more children. Six of the seven died ( Margaret survived). Of those born before 1900, William/Bella survived and John died. Those dying that you have identified would be, according to your records, John, Ella, Paul (1) and Paul (2), which amounts to five. If the 9/2 record in the 1910 census is correct, you are missing two. Mary, the daughter born in Hungary was not counted in the 1900 Census but she may have been recalled in the 1910 census, which would leave one to be identified. This is not unusual. I have an aunt die in infancy in Dayton around the same time frame and an official record of her death has never been found. Jerry