If you will look on my site, there are several records for Columbus Monroe where he is called Thomas or Tom Smith. In a daughters marriage certificate for example " the wedding was held at the home of the brides father, Tom Smith". He is also identified as Tom Smith in the diary of Adam Hodam . My aunt told me Robert McCoy gave him the nickname Thomas as Columbus reminded him of one of his brothers, Thomas. Not sure if that is the reason but Columbus was called Thomas by everyone.