Catherine is simply Catherine and she is not meant to refer to the decidedly great Yekaterina.
Yeah, I like catherine. I've got way more issues with Yorrick.
If ever there was a walking stereotype . . .
Although even Yorrick has some moments. Like his ridiculously lethal Fangbear (seriously, they kill off 5% of my population, were people lying down in the streets for them?), or needing to replace a brittle bone.