The Meanings of Last Names

Picked "Lewis" at random.

• Germanic Origin: The most common origin traces back to the Old German personal name "Hludwig." This name is composed of two elements: "hlūd" meaning "fame" or "loud," and "wīg" meaning "battle." The name was Latinized as "Ludovicus" and Frankishized as "Chlodowech," eventually leading to the Old French "Louis." The Norman French brought "Lowis" to England, which evolved into the surname Lewis. In this context, the meaning is related to "famed battle" or "renowned warrior."
• Welsh Origin: In Wales, "Lewis" is often an Anglicized form of the Welsh personal name "Llywelyn." The meaning of "Llywelyn" is debated but is often associated with "leader" or possibly "lion-like." So, for families with Welsh roots, the surname can carry this connotation.
• Irish Origin: "Lewis" can also be an Anglicized form of the Gaelic surname "Mac Lughaidh," meaning "son of Lughaidh." The personal name "Lughaidh" is derived from "Lugh," the name of a prominent Celtic god associated with brightness or light.
• Jewish Origin: In some cases, "Lewis" is an Anglicization of Jewish surnames like "Levi" or "Levy." These are of Hebrew origin and relate to the tribe of Levi, one of the twelve tribes of Israel, traditionally associated with priestly duties.

Smith!
The last name "Smith" is an occupational surname of English and Scottish origin. It derives from the Old English word "smið," which means "one who works in metal," particularly a blacksmith. The word itself comes from the Old English verb "smitan," meaning "to strike or hammer."
"In essence, if your last name is Smith, it most likely means that at some point in your ancestry, someone was a blacksmith or worked with metal. It's a testament to the vital role these skilled workers played in history."

I picked Icelandic surnames... The info is from google.

In Iceland, they don’t really do surnames like... family names. Instead of passing down a family name, they go with a patronymic or matronymic system – basically, your last name comes from your mother's or father's first name. So if your father’s called Jón, you’d be Jónsson if you’re a boy, or Jónsdóttir if you’re a girl. Some folks use their mother’s name instead, and every now and then, someone might use both. Oh, and they don’t change names when they get married either. Everyone just sticks with their own name.