I have Towlers in my family too, and have found that in some census indexes and lists they have been misread as Fowler, Foler, Foller, and Fuller. Just thought this might help. T's and F's often get mixed up on indexes. Often, though, when you look at the original page you can see the difference in the T's and F's. I have found this quite often, especially on ancestry.com indexes for their censuses, and tax lists etc, And I assuming they are probably not the only ones who have made this error.