This is the 6885th most frequent Russian word.
адриан
"Адриан" is a Russian male given name, equivalent to "Adrian" in English.
Here, 'Адриан' is used as a proper noun referring to a person's name, indicating the subject performing the action.
Адриан играет на гитаре каждое утро.
Adrian plays the guitar every morning.
In this sentence, 'Адриана' is used in the genitive case to show possession, indicating that the book belongs to Adrian.
Книга Адриана лежит на столе.
Adrian's book is lying on the table.
This usage of 'Адрианом' is in the instrumental case, showing the person with whom the consultation occurred.