Finnish: from pelto ‘field’. Originally a habitational name from a farm named for its location in a field, this surname was widely adopted as an ornamental name during the early 20th century; it is now also found throughout southern and central parts of the country.innish: from pelto ‘field’. Originally a habitational name from a farm named for its location in a field, this surname was widely adopted as an ornamental name during the early 20th century; it is now also found throughout southern and central parts of the country.