The 1880 U. S. census shows T. J. married to Elizabeth.Six children were living with them, more than the four you suggest.
Four of the six are daughters, M. E,, C. R., L. B., and J. N.Only initials are given.Two are sons R(ichard) J. and W(esley) W.The names Richard and Wesley are nice fits, because T. J.'s father was named Richard, and he had a brother named Wesley.
Perhaps T. J. was only married to Isabella for only a brief time prior to marrying Frances, making the 1859 date correct.
T. J. is not in my direct line from Rev. Benjamin.One thing I am trying to do now is identify all of the Doggetts who served in the Confederate Army and specifically note all of those who are direct desdendents of Rev. Benjamin.T. J. and his brother fit this bill.There were other Doggetts in the CSA from Texas, but I have not be able to connect them to Rev. Benjamin.Any info that you have in this regard would be appreciated.