Släkthistoria för Soady
Soady Vad efternamn betyder
perhaps from an unrecorded Middle English female personal name *Soude or *Soudy *Saude or *Saudy which could be pet forms of Isoud and Isaud i.e. Isold (see Izzard). The final -y would represent either a typical Devon and Cornwall pronunciation of final -e or the Middle English hypocoristic suffix -y. This explanation easily accounts for the variation between Soady and Sawdy in many Devon and Cornwall parishes. However the absence of any medieval evidence for either the given name or the surname makes it an uncertain explanation.
Källa: The Oxford Dictionary of Family Names in Britain and Ireland, 2016
