I'm assuming your name is written out with two middle names on your birth certificate. When you fill out legal forms do you just use one of your middle names? For example, on your credit cards, license, etc. does it say John W. Doe, John W.J. Doe....?
Are there any circumstances where you do need to use both middle names?
I've never been big on the two middle names thing, but my grandma passed away and I've been thinking it'd be nice to honor her. Her name was Mary Lou, though. My other grandma is Mary Louise so I've thought of using Mary Louise in the middle for both of them, but wondered if it would cause any problems.