Seems a lot of countries names have changed as recent as the 1900s—While I understand that name changes also occur on the local levels, sometimes due to influence from another culture—it seems Divide and conquer is the reason that much changes

My opinion, this is one of the ways used to make it difficult to understand our TRUE history. Part of the amnesia syndrome. Young people no longer understand the elderly and vice versa. That's why so much changes; names, systems, schools, language, culture, and so on—to make a people forget/ lose connection with their past, so they don’t know themselves