It's called the Star of Bethlehem or a Lone Star quilt
http://tinyurl.com/ye76k8j
This old multi-pieced star block is known by many names. The Mathematical Star was an early name used in England and along the Eastern U.S. seaboard, especially near Baltimore. The Star of Bethlehem is a well-known name for it all around the country and is still used today. Other names for the same pattern are the Star of the East, Morning Star, which is what Native American's call it, and Lone star, which is the name given to this pattern by Texan quilters because they are called the lone star state.
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PS - I'm not that knowledgable about quilts; this is about the only I know by name...