Someone who I know has the last name ‘Island’ and was unable to sign up for Facebook forever because they thought it was a fake last name. Maybe ‘Siren’ is sim

Someone who I know has the last name ‘Island’ and was unable to sign up for Facebook forever because they thought it was a fake last name. Maybe ‘Siren’ is similar. It’s a pre-existing word that perhaps flags some sort of weird edge case.