It is quite difficult to come up with synonyms for a proper name such as Reginald Carey Harrison. However, Reginald, Carey, and Harrison are all common first, middle, and last names respectively. As a result, there are plenty of synonyms that can be used to describe or refer to an individual with a similar name. Some synonyms for Reginald could be Reggie, Reynold, or Regino. For Carey, some synonyms could be Kari, Cari, or Carina. Lastly, some synonyms for Harrison could be Harry, Harris, or Hare. These synonyms could be used in various contexts such as personal or business communications, and creative writing.