What do you put in a country list for countries with more than one common name?

I'm from England, which means in drop-down lists I have to search for United Kingdom, then England, then Great Britain... it's generally the UK, but it does vary from site to site. What is the best practice for cases like this where there are multiple ways to refer to a country?

Edit: I should clarify what the problem is, here. When presented with a big list, I have to go hunting. The problem isn't that I'm confused about which to pick out of say, England and UK, the problem is being presented with a long list I have to search and have no idea which one to look for. It's very frustrating when a list doesn't have whichever one I look for first... or second... so I have to look in three different places to find my country.

I'm sure there are other examples out there of similar situations, this isn't specific to the UK I'm sure.