There’s no reason to be confrontational here; I’m wondering why we refer to some people by their first name rather than they last name. The most obvious reason is when there’s already a famous <last_name> (e.g. "Hillary" vs. "Clinton"), or if you know that person personnally. Wikipedia refers to both Marissa M_a_yer and Larry Page (and everybody) with their last name. Do you have some examples of e.g. press articles where Brin or Page are referred to by their first name?