This is the 4708th most frequent Polish word.
nazywał
"Called" or "was calling" (past tense of "to call/name").
In this sentence, 'nazywał' is used to indicate a past habitual action of naming or referring to an object or place by a particular name.
On kiedyś nazywał ten park Zielonym Ogrodem.
He used to call this park the Green Garden.
Here, 'nazywał' is part of 'nazywał się,' meaning 'his name was,' expressing the name identification of a person in the past tense.
Mój dziadek nazywał się Jan.
My grandfather's name was Jan.
In this example, 'nazywał' appears as part of 'nazywali,' referring to the act of naming or referring to something by a certain term in a past context with a plural subject.