Langseth is a surname of Norwegian origin, derived from the Old Norse words langr ("long") and setr ("farmstead" or "dwelling"), meaning "long farmstead" or "long dwelling." It is a topographical surname that likely originated from a person who lived on or owned a farmstead that was notably long in shape or size. According to U.S. Census data, the surname is relatively rare, with approximately 586 bearers in the United States as of the most recent available records.
Notable references include:
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Marcus G. Langseth (1932–1997) — A pioneering American earth scientist and geophysicist who spent 40 years at Columbia University's Lamont-Doherty Earth Observatory. He specialized in marine geothermal research, particularly the study of heat flow beneath the ocean floor. He served as co-chief scientist on Leg 56 of the Deep Sea Drilling Project and published numerous scientific papers on sea-floor hydrothermal systems and heat flow.
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RV Marcus G. Langseth — A research vessel operated by the Lamont-Doherty Earth Observatory of Columbia University as part of the University-National Oceanographic Laboratory System (UNOLS) fleet. The ship was dedicated on December 4, 2007, and entered service in early 2008, replacing the RV Maurice Ewing. It is the only UNOLS vessel equipped to carry out marine multichannel seismological research, capable of deploying multiple hydrophone arrays and air gun arrays for two- and three-dimensional imaging of the ocean floor and Earth's deep interior. The vessel was originally built in 1991 as the Western Legend and was purchased from WesternGeco in 2004. It is owned by the National Science Foundation.
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Sydney Langseth (born 2002) — An American professional ice hockey forward who plays for the Seattle Torrent of the Professional Women's Hockey League (PWHL). She played college ice hockey at Minnesota State University, Mankato.
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Langseth Engineering — A company specializing in biomass-based negative emissions technologies, including pyrolysis, torrefaction, carbonization, and bioenergy carbon capture and sequestration (BECCS).
