RootsChat.Com

As others indicated also..it actually was a very common practice of interchanging names anytime.  The last one I came upon had just happened in 1910. The 1910 circumstance is the father died and even though adult children.. they took stepfather name when their mother married.  The one adult switched back to birth name but the other adult son kept stepfather name and gave his own children the stepfather name.  Info passed down except for last 3 generations so it makes for a surprise.