Question: Who is the paternal grandfather of Randolph Greene Pack?

Knowledge 1: Randolph Greene Pack
Randolph Greene Pack (1890 in Cleveland, Ohio – December 25, 1956 in Greenwich, Connecticut), son of Charles Lathrop Pack, grew up in Cleveland, Ohio, at the turn of the century.He attended the college preparatory Ransom School, followed by stints at Williams College (class of 1913) and Penn State, the latter in a forestry program. [SEP] Knowledge 2: Charles Lathrop Pack
Charles Lathrop Pack (May 7, 1857 – June 14, 1937), a third-generation timberman, was "one of the five wealthiest men in America prior to World War I".He owed his good start in life to the success of his father, George Willis Pack, and grandfather, George Pack, Jr. in the forestry sector.Growing up on Lake Huron in Michigan's Lower Peninsula, Charles L. Pack lived in Cleveland, Ohio, from 1871 to the early years of the 20th century.With "savvy investments ... in southern timber ... banking and real estate", Pack became a multi-millionaire.During World War I, he was a principal organizer and was heavily involved in the war garden movement in the United States.
Knowledge 1: Charles Lathrop Pack
Charles Lathrop Pack (May 7, 1857 – June 14, 1937), a third-generation timberman, was "one of the five wealthiest men in America prior to World War I".He owed his good start in life to the success of his father, George Willis Pack, and grandfather, George Pack, Jr. in the forestry sector.Growing up on Lake Huron in Michigan's Lower Peninsula, Charles L. Pack lived in Cleveland, Ohio, from 1871 to the early years of the 20th century.With "savvy investments ... in southern timber ... banking and real estate", Pack became a multi-millionaire.During World War I, he was a principal organizer and was heavily involved in the war garden movement in the United States. [SEP] Knowledge 2: George Willis Pack
George Willis Pack( born 1831, Peterboro, New York; d. August 31, 1906, Southampton, Long Island, New York) was a second- generation timberman on Michigan's Lower Peninsula.Building on his father's legacy, over the course of several decades, Pack successfully developed his timber businesses, becoming one of Michigan's first millionaires.His son, Charles Lathrop Pack; and grandson, Randolph Greene Pack, carried on the family tradition.
Knowledge 1: George Willis Pack
George Willis Pack( born 1831, Peterboro, New York; d. August 31, 1906, Southampton, Long Island, New York) was a second- generation timberman on Michigan's Lower Peninsula.Building on his father's legacy, over the course of several decades, Pack successfully developed his timber businesses, becoming one of Michigan's first millionaires.His son, Charles Lathrop Pack; and grandson, Randolph Greene Pack, carried on the family tradition. [SEP] Knowledge 2: George Pack Jr.
George Pack Jr.( 1794 in Saint John, New Brunswick, Canada – April 15, 1875 in Pack's Mills, Michigan) was a businessman, landowner, sawmill operator, and postmaster on the Lower Peninsula of Michigan.The town of Pack's Mills of which he was also postmaster, was named after him.Pack's son, George Willis Pack; grandson, Charles Lathrop Pack; and great- grandson, Randolph Greene Pack were to follow him in the timber business in Michigan, New York and beyond.

Answer: George Willis Pack