The English surname Daughty and Doughty are phonetically equivalent, and the like-sounding surname Doty is fairly common in the US. The family of Enoch Daughty (son of Francis Daughty) miagrated from New York to VA pre-Revolutionary war. This family line has been traced back to the 1500s in England and is possibly the origin of some Daughety/Doughty/etc. lines of today..
It seems to be an unfounded common assumption that DAUGHETY is a minor variation of the Irish Daugherty, but the former is pronounced as "daughter , clip the 'er' and add 'y'" while Daugherty is a rough English phonetic rendering of a Gaelic name, prounounced something like "doch-er-tee" according to expatriate Irish acquaintances. The English Daughty seens to have well existed before the Anglo-Gaelic Daugherty was coined.
According to genealogists I have spoken with, some social organizations blurred the lines in the 1920-1950 era in order to establish pedigrees going way back, and these pedigrees are now of entertainment value only. Original documentation is difficult and expensive to search out.
I am interested in sharing information and ideas with others who want to protect the identity and integrety of the Daughety surname.