so I checked and apparently the primarch's name is pronounced "Rah-boo-TAY GILL-e-man."
I'd not only assumed "Roh-boot" but also "Gwille-mah" since an exemplar of honorable action who wears a blue uniform in service to an emperor obviously has to be French, right?
@Leucrotta The way I see it? Linguistic drift would occur over 40 kiloyears. *shrug!*