The Lamchin[1] were one of many tribes of the Ohlone (Coastanoan) people, Native Americans who lived along the San Francisco Peninsula.
Information is sparse and dispersed, coming mostly from Spanish mission records – as the natives had no written language.
The main village name appears to contain a word for vermin, which the Spanish missionaries translated as las Pulgas (the Fleas).
The names still lives on as Alameda de las Pulgas, a local main thoroughfare connecting peninsula towns along the feet of the foothills.
The mission's baptismal record mentions other Lamchin villages of Ussete, Guloisnistac, and Ssupichom.