Mary Amelia Ingalls (January 10, 1865 – October 20, 1928) was born near the town of Pepin, Wisconsin. She was the first child of Caroline and Charles Ingalls and older sister of author Laura Ingalls Wilder, known for her Little House book series.
Rose Wilder Lane (December 5, 1886 – October 30, 1968) was an American journalist, travel writer, novelist, political theorist and daughter of American writer Laura Ingalls Wilder. Along with two other female writers, Ayn Rand and Isabel Paterson, Lane is noted as one of the founders of the American libertarian movement.
Grace Pearl Ingalls Dow (May 23, 1877 in Burr Oak, Iowa, USA – November 10, 1941) was the fifth and last child of Caroline and Charles Ingalls. She was the youngest sister of Laura Ingalls Wilder, known for her Little House on the Prairie books.