Only just discovered this post! I am the person doing the ROWBERRY One-Name Study.
Although it is called the ROWBERRY One-Name Study it also includes many variants, such as my own name RUBERY. In fact these are the two most frequent variants found today, closely followed by ROWBURY and RUBERRY. Others still extant include REWBURY, ROBERY (growing), ROEBURY, ROVERY, ROWBERY, ROWBORY, ROWBREE(dying out), ROWBREY, ROWBURREY, RUBBERY, RUBBRA, RUBRA, RUBREY and RUBURY. And in the USA RHUBERRY.
In the past many other variants have been noted, but as far as I am aware they are not still in use. In most cases it is impossible to say that present day variants are only linked to others using the same spelling as, due to inconsistencies in recording, changes were still occurring up to the beginning of the twentieth century. So if you are possessed of, or have an interest in, any of the above surnames I hope that you will find something of interest on my website:
www.rowberry.orgAnd you are always welcome to contact me with queries - you will find a contact link on each page of my website.
Kind regards
Polly Rubery