That is the correct spelling of a proper noun Lounsbury, and also Loundesbury.
Michael Lounsbury was born in 1966.
Jim Lounsbury was born in 1923.
Jim Lounsbury died in 2006.
Lounsbury Foods was created in 1962.
Thomas Lounsbury died in 1915.
Thomas Lounsbury was born in 1838.
Floyd Lounsbury died in 1998.
Floyd Lounsbury was born in 1914.
Hewitt Lounsbury died in 1971.
Grant Lounsbury was born in Toronto, in Ontario, Canada.
Phineas C. Lounsbury was born in 1841.
Phineas C. Lounsbury died in 1925.