I know, I know. I keep harping on the Argonaut story (which may seem odd to those who already know that I find Jason to be such a despicable weasel [see Jason's Angels]), but here's something useful for you when you're reading one of the ancient accounts, like the Argonautica. You may get confused because the author limits use of the first name of a given hero, preferring, instead to call him "the son of so-and-so." Since you're probably indifferent to his genealogy, and all you probably really want to know is the real name of the hero, you may want a quick reference so you can stop confusing the sons of Aeetes, Aegeus, and Aeacus. Bulfinch comes to the rescue in this one-line-an-entry glossary: Bulfinch's Mythology Glossary.