This is the 8050th most frequent Russian word.
криштиану
The word "криштиану" is a transliteration of the Portuguese name "Cristiano," commonly referring to the football player Cristiano Ronaldo.
In this sentence, 'Криштиану' is a proper noun used as the first name of the Portuguese football player Cristiano Ronaldo.
Криштиану Роналду один из лучших футболистов мира.
Cristiano Ronaldo is one of the best football players in the world.
Here 'Криштиану' refers to Cristiano Ronaldo, emphasizing his involvement in a specific match.
Я недавно видел матч, где играл Криштиану.
I recently watched a match where Cristiano was playing.
'Криштиану' is again used as a personal name, stressing his action during a football game.