The name Cordelia comes from Cordeilla which is a Celtic name with unknown meaning. However, the name is often associated with the Latin word cor or cordis which means "heart". Some sites also say that it means "Daughter of the Sea". So I suppose you can take your pick of meanings!
Based on the legendary Queen Cordeilla, she was a character in Shakespeare's play King Lear written in 1606. He altered the spelling from the original Cordeilla to the modern Cordelia. In the play, she was the youngest of King Lear's three daughters and the only one that remained loyal to him.
Another literary reference to the name comes from the heroine of Anne of Green Gables who said "I would love to be called Cordelia. It's such a perfectly elegant name."
This name has been in regular usage since 1880 in the US. It received a small boost in popularity from 1915-1927 before slowing down a bit through the rest of the century. Right around 2002, the name once again gained a slight boost. In 2012 there were 204 baby girls given the name which puts it at a ranking of #1196. The name has not been in the Top 1000 since 1950.
Sibling Name Ideas:
Sisters: Annabel, Beatrice, Cecily, Eleanor, Juliet, Matilda, Sabrina, Violet
Brothers: Alistair, August, Charles, Elijah, James, Jasper, Sebastian, Vincent
Middle Name Ideas:
As a Middle Name: