Of the three types of land-ownership in old Poland
(royal property, Church property and noble property)
Malachowo was a noble property - it belonged to nobles.

The Malachowo villages
belonged to various noble families,
to some for a while, to some for generations.

'Nobilis de Malachowo' or 'Malachowski'
for some was just a short-lived title,
for some it became a surname.