In fact, Clint Barton was the second character to take up the Ronin identity.
Clint's legacy as Ronin was one of the driving factors of the Hawkeye series, with the Kingpin's and his henchmen the Tracksuit Mafia coming after him and Kate for revenge for being targeted by Ronin during the five years between the Snap and the Blip.
Having spoken with Eleanor, who asked him to keep her daughter safe, Barton stepped inside the elevator and examined the sword.
He took up the mantle in 2007 after his character was offed and resurrected during the House of M comic run.