Albert Quinn Ingalls is the adopted son of Charles and Caroline Ingalls in the television series, but did not appear in the books. He is not listed as having been a real person, though Charles had a real nephew named Albert. AnswerParty!
There are many Little House on the Prairie characters, appearing in various forms of media in the Little House on the Prairie media franchise.
Little House on the Prairie is a media franchise that started with a series of children's books by Laura Ingalls Wilder that were originally published between 1932 and 1943.
Caroline Ingalls, born Caroline Lake Quiner (December 12, 1839 – April 20, 1924) was the mother of Laura Ingalls Wilder, author of the Little House books.
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. She was the older sister of author Laura Ingalls Wilder, who is best known for her Little House on the Prairie book series.
Charles Phillip Ingalls (January 10, 1836 – June 8, 1902) was the father of Laura Ingalls Wilder, known for her Little House on the Prairie series of books. Ingalls is depicted as the character "Pa" in the television series.