What are lepidus?

Some articles on lepidus:

Marcus Aemilius Lepidus Porcina - Politics
... Lepidus was a man of education and refined taste ... In politics Lepidus seems to have belonged to the aristocratic party ... Cassius Longinus Ravilla and it appears from a fragment of Priscian, that Lepidus spoke in favour of a repeal of the lex Aemilia, which was probably the sumptuary law ...