Is Pacquiao The Only Man To Win a Flyweight and a Lightweight Title?

[MakeDamnSure]

I really want to know if there is someone who won a Flyweight title or even below that and have won a Lightweight title? Pac in his resume won the WBC Flyweight Title and defended it few times.. Imagine a former Flyweight champion, winning a lightweight and a Junior Welterweight Crown..

Is there someone?