Stepgrandson is a term that refers to a grandson that is related to someone only through a stepfamily connection. However, there are several other terms that can be used to describe this relationship. For example, the term "grandstepson" can be used to refer to the son of one's stepchild. Another term is "step-grandchild" which refers to any step-related grandchild, regardless of gender. Additionally, some individuals may use the terms "step-grandson-in-law" or "step-grandson-by-marriage" to describe their relationship with their stepgrandson. Regardless of the specific term used, the important thing is to recognize and celebrate the family bond that exists between stepfamily members.