I went through them all manually and found all the players by Googling, for example, "England cricketer born 1 April 1900". Took a while but I used voice search rather than typing. From memory the dummy player also has same initials as the real one and their stats all match up in cases where you're not 100% sure. It'll take a while !
Oh, generally speaking the default players look, at best, very little like the real ones and often have jarringly awful features to make them look 99% different to how they should. Players with dreadlocks or other hairstyles way out of keeping with their era or totally wrong hair colours, ridiculous facial hair... I'm pretty much saying that renaming is only half the job if you're bothered about even vague authenticity !