Board Thread:General Grimm Discussion/@comment-121.54.32.138-20150104085930/@comment-31350033-20170222061711

Silas has said adamantly in interviews that Monroe's name is not "Eddie" -- that was an early thing the writers later dropped. Monroe's own parents call him "Monroe". His mother's maiden name is Dietrich (as with Uncle Felix) but with all the goings-on about their deep German heritage, it'd be weird for Bart's surname to be Monroe (a name of Scottish origin) unless Bart's German side is from his mother? I suspect maybe the writers just didn't work all this through, leaving us to obsess about it! ;)

And yet -- on the ultrasound monitor when they discover there are triplets on the way, the "Patient Name" is displayed as Rosalee Calvert Monroe.

Wonder if there'll ever be a definitive answer? Perhaps we'll have to go with Roacher27's theory that he's mononymous, having changed his name or dropped part of it at some point, as Silas has said in interviews, "like Cher!"