My name comes from ancient history.
Jehoiada was a preist of Israel during reign of King Joash. Joash was seven years old when he came to the throne. Joash wanted to be a good king and with the help of Jehoiada he was able to fix the temple and earn favour with the people. But Jehoiada died at the age of 130, then Joash still being young was influenced to do wrong, he started worshiping false gods. God moved Jehoiada's son to tell Joash to get right, but he harkened not and stoned Jehoiada's son. Therefore God moved to judge the king and all the people who followed him. The enemy came and took some land, the king went to fight and marched thousands of soldiers to their death, which finally lead the people to rise up and kill him. If only he had taken to heart what God through Jehoiada had told him.
So I named myself Jehoiada, so that I may help someone go in the right direction.
Full account is located in 2 Chronicles 24, The Bible.