Rosser is a surname of Welsh origin, derived from the Welsh word "rhos" meaning moorland or heath. It is a relatively uncommon name, often found in Wales or among Welsh immigrants. Those with the surname Rosser are likely to have Welsh ancestry and may have a strong connection to their heritage. The name Rosser is often associated with qualities such as resilience, determination, and a deep appreciation for nature. Overall, Rosser is a distinguished and meaningful surname with a rich history.