The son WIlliam Right is 10 mos old on the 1880 Sevier Co census. In the next column, it states he was born in Aug, so that would have been 1879 since this census was June 1880.
Also, on John's WWl Draft Card, it has his middle name as Henry. Don't know if you have picked that up, but it may be relevant when trying to order certain records.Have you tried for his death certificate?
Do you know where Ida or William died? If you can not get one on John I would suggest one of theirs, if possible.
I would say that since Margaret married JW Savall in 1892, William prob died ca 1890-91. They often did not stay single long, especially when several children were involved.
Let me know abt Ida and William, I will do some more searching on them.They are definitely related to my Wrights, they can't get past using the same names. Mine were in this area of Sevier Co from abt 1812-until Little River became a county in 1868.