Did they use pounds in medieval times?

Answer 1

Pounds as a measure of weight were used in many European countries in the Middle Ages. In medieval England, the Pound Sterling was sometimes used as a unit of accounting (currency). Things were, however, not priced in pounds at the time.

Answer 2

Pounds were used in the Middle Ages, both for weight and for money. In fact, pounds and ounces were used in the Roman Republic, both for weight and for money; the original Roman coins were made of copper and the large ones usually weighed a pound, sometimes two or even three. After inflation reduced the value of the aes, as they were called, to about a twentieth of what it had been, the Romans introduced new coins of the type called a denarius, and these became the denier, in France, and the penny in England, which is why the abbreviation for pence is d.