Hello, my great-great grandfather was Thomas Jonah. Here's his information. The census information states his parents were born in France. Thomas could be a son or nephew perhaps? If William was born in 1841, he's likely too old to be a sibling of Thomas. Here's his info from the 1900 US census:
Name: Thomas T Jonah
Home in 1900: Justice Precinct 5, Bee, Texas
Age: 34
Estimated Birth Year: abt 1866
Birthplace: Ohio
Relationship to head-of-house: Head
Spouse's Name: Lillie N
Race: White
Household Members: Name Age
Thomas T Jonah 34
Lillie N Jonah 21
Thomas and Lillie had Stella, my great grandmother, who married Raymond McNeny, they had Lillie, who is my grandmother.
Cheers.
=)