There's a Younger Jonas Brother!

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Joe Jonas was spotted out and about yesterday on Robertson Blvd in LA leaving a lunch at the Newsroom Cafe.

Joe was snapped with his latest girlfriend, Blanda Eggenschwiler, 29.  Blanda is from Switzerland and is a former model, of course!

Along with the couple is a YOUNGER JONAS! I had no idea!

Frankie Jonas ate lunch with his older brother and lady love.

The threesome had a lunch after Joe tweeted this: “Shooting @scenemagny today. Happy day”