The name Jay came from the Latin “gaius” meaning “gay or merry.” The species name cristata originates from the Latin word crista, meaning “crested.”
Blue Jays eat fruit, nuts, berries, seeds, and suet. However if you offered a buffet, their first choice would be peanuts in the shell.
You’ll find that they will shuffle through the seeds until what they are looking for is found. They'll pick a seed up in their bill to test the weight. If it's not heavy enough they'll pick up another to compare the weight of the seeds. It's not worth their while to eat or cache seeds that are dried out or spoiled.