Henry Sill was born on December 15th, 1851.1 Henry Sill's father was Elijah Strong Alvord and his mother was Emily Sill. His paternal grandparents were Nathaniel Alvord and Eunice Strong. He had three sisters named Emma, Anna and Carrie. He was the oldest of the four children. He died at the age of 1 on June 20th, 1853.1