Option to view past names

I know I'm not alone on this one, but whenever a friend of mine changes his/her name on league, I have no clue who it is anymore. Having to ask people "Who are you!?" in pms is pretty awkward, so I thought the option to view past names (Kind of like in steam), would be a good fit for league. I know this issue isnt as grand as most right now, but it would be nice.