Dog Tag Information

[Brenda]

I am looking for some information so I can have dog tags re-punched for my grandparents and have a few questions to be sure of accuracy. My first question is; is there a record of what was on GI's dog tags anywhere so as to not have to guess about info? If so where? If not, my second question is; who is usually used as the next of kin, mother or father? Third question is; I am having trouble finding the correct blood type to put in, where is the best place to find this if there is one or is that just pouring through in family records?

 

Thanks for any help anyone can give,

 

Dan