About grave's and funeral tombstone's in wotlk

Hello Warmane community i seen couple of months ago or even a year some posts why blizzard made so many graveyards and tombstones with people name, some of you dont know why, some NPC's got people real name and u was askin ur self that's why , blizzard made that graves , tombstones,some npc with people name in tribute for them. Here's a link of a video made by a player from retail who explain and show all the in-game graves/tombstone/NPC's who have real people name and why they have this name's http://www.warcraftmovies.com/movieview.php?id=226269

Here is the my thread:
http://forum.warmane.com/showthread....er-should-read