I know you posted your message over a year ago, but I decided to do this follow-up message incase you have found out more information on your Pflug family by now.
My Pflug family was also from Germany, but where in Germany I do not know.It seems that any of the Pflug families I look at have a relative that was born in Germany and moved to somewhere other than where my Pflug family lived, which was Massachusetts and Rhode Island.
Do you know where in Germany your Pflug family came from? Thanks for any info you can provide. Donna