Willis Carrier
Willis Haviland Carrier (November 26, 1876 – October 7, 1950) was an American engineer, best known for inventing modern air conditioning. Carrier invented the first electrical air conditioning unit in 1902. In 1915, he founded Carrier Corporation, a company specializing in the manufacture and distribution of heating, ventilation, and air conditioning (HVAC) systems.
Willis Bradley Haviland
Willis Hoag Haviland, a farmer, and his second wife, Hannah Wing Haviland, were first cousins once removed, which caused friction with the Quaker Meeting to which they belonged, ending in severance with the church. Hannah Wing Haviland's half-sister was Ann Elizabeth Button (27 Mar 1823 – 15 Mar 1849), wife of David Jay Haviland (29 Mar 1820 – 13 Aug 1868); they were the parents of Elizabeth R. Haviland (1845–1888) who would marry Duane Williams Carrier and have only child Willis Haviland Carrier in 1876, later the inventor of modern air conditioning technology. Willis Haviland Carrier was named after Willis Hoag Haviland, who after Elizabeth's father's death took care of her before she was married. (Willis Hoag Haviland was also Elizabeth's uncle-in-law.)