Roxanne Simpson was created in 1972.
Roxanne Miller was created in 1992.
IF you are referring to the Johnny Blaze version, then it is Roxanne Simpson
Simpson Grierson was created in 1887.
Marge Simpson was created in 1987.
Simpson Tower was created in 1968.
Maggie Simpson was created in 1987.
Simpson's Grove was created in 1800.
Archie Simpson was created in 1987.
Grampa Simpson was created in 1988.
Fort Simpson was created in 1803.
Sophie Simpson was created in 1990.
Simpson's-in-the-Strand was created in 1828.