First found in Polesie, the largest province of Poland. It is inhabited by Ruthenians, called Polesians, of Ukrainian descent. The main towns are those of Brest Litovsk, Pinsk, Kobryn, Kamenets, Litovsk, and Luninets. It was in this province that the renowned Radziwills and Sapiehas held their vast estates. Wolczyn was the seat of the Czartoryski family. The surname became noted for its many branches in the region, each house acquiring a status and influence which was envied by the princes of the region. In their later history the name became a power unto themselves and were elevated to the ranks of nobility as they grew into this most influential family. The family were seated in Krakow in 1426.

Some of the first settlers of this family name or some of its variants were: Jacob Lachowski, who emigrated to Pennsylvania in 1882; and Vicenti Lachowski, who settled in Baltimore in 1909.

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