P.C. McLean was a native of New York City. He married Margaret Swasey in about 1829. The had five known children:
Charles E. (1831-1897)
Peter Byron (1932-1895)
Nathaniel Bruce (1838-1860)
Sarah Amelia (1842-1912) m. John M. Page
P.C. was a painter and grainer in Brooklyn. When his son, Peter B., came home from the Civil War sick with typhoid fever and malaria, P.C. supported P.B.'s family for several years as he recovered.
He was originally buried in Union Cemetery in Brooklyn. Union Cemetery closed and between Dec 1897 and Jan 1898 the bodies were removed and relocated. A ten acre section of Cedar Grove was dedicated for the interments, however the records identifying plots have been lost. It is unknown which plot the McLean family occupies.