Barbara Pierce Bush
Along with her twin sister, Jenna, Barbara Bush was 19 years old when her father, Governor George W. Bush, was first elected president. She was named after her paternal grandmother, the former first lady, and graduated from Yale University like her father and grandfather.
Today, Barbara lives in New York City, works with the Cooper-Hewitt National Design Museum and serves as president and co-founder of the Global Health Corps. Often described as the quieter of the twins, Barbara typically stays out of the spotlight, but she made political news when she voiced her support for legalizing gay marriage in 2011.