This is the 7270th most frequent Polish word.
juszczyszynowi
"Juszczyszynowi" is a dative form of the surname "Juszczyszyn," used to indicate "to Juszczyszyn" or "for Juszczyszyn" in Polish.
In this sentence, 'juszczyszynowi' denotes the indirect object, representing Juszczyszyn as the recipient of the award.
Juszczyszynowi dano nagrodę.
Juszczyszyn was given an award.
Here, 'juszczyszynowi' is used as the dative form indicating to whom the letter was given.
Wręczyłem Juszczyszynowi list.
I handed Juszczyszyn a letter.
In this case, 'juszczyszynowi' is incorrectly used as it should be 'dla Juszczyszyna' in proper Polish; it demonstrates common errors in usage.