I have registered both names with the Guild of One Name Studies of which I am member number 359.
My interests started in 1976 with evening classes in family history learning how to trace one's own family tree and slowly broadened into one name researches when I found out how uncommon was the occurrence of Olivey. The Tizzard study followed later when I could not find a particular Thomas Tizzard and I decided to look for all likely candidates.
In pursuing this hobby I have found membership of organizations to be invaluable and currently I am a member of the following:-