Unknown is a problem. Unknown is a challenge. Genealogists deal with unknown. What's interesting is that they are not really unknown. They do have family attached so generally it's the name that's missing.
Unknown, Abigail 1600 - Warwickshire, England 1627 - Jamestown, James City, Virginia, USA
She was born in 1600 in Warwickshire, England and died in 1627 in Jamestown. She is my 10th great grandmother and was married to Daniel Lucye. It says they both died in 1627. That's a clue.
Unlike those who came before me, I do have access to the Internet so it's the first place I went. Daniel Lucey, Lucy, Lucye comes up in a search. He immigrated to Jamestown, Virginia on the "Susan" in 1624. It is assumed that Abigail was with him since he married Abigail, "the tanner's daughter about 1617. He was the youngest son of Timothy Lucy. He died owing Richard Kingsmill 500 pounds of tobacco. The website I found has other details of the family in England. Today, I am not going to worry about the accuracy of the data, only that Abigail Unknown was a wife and mother and lived a tragically short life.
There are other unknown's in my tree. Unknown's are a challenge that can't be left alone. We may never know their last names but that doesn't stop any of us from trying to find the answers.