Normans aren’t quite “frogs,” lol. They’re Norsemen (Vikings) mixed with Frankish (French). If you’re Norman your people likely go back to at least the tenth century in England, and as they more or less introduced the practice of using surnames in England to individuals other than nobility, you may actually be able to find them. Nevermind the Frenchified “de-This” and “de-That,” most dropped the use of it over time.
Mine were on the other side at Hastings. Got one by what is presumed to be my surname on the Roll of Battle Abbey and one by a maternal surname. Not really any way to prove relation, though. The plague years, resulting poor records, people moving around. The trail went cold long ago, 1400’s is as far back as I’ve ever been able to prove with any of them.
The interesting thing is that the Winton was dropped and became Anglicized to its present spelling, Little Bill, in the 1200’s for some reason or another.
The Welsh book of Lesser Nobility and Gentry was a Guide when I was looking to be oppressed.
Another interesting thing is that we were in the Staple, wool, as merchants it was easier to draw lines due to appreniship records.
Every Name was checked at least three times bottom up, top down, multiple marriages were a problem, along with a few kids on the left hand.
Surnames are new to Mongolians as well.