This is the 7190th most frequent Russian word.
василия
"Василия" is the genitive or accusative form of "Василий," a Russian male name equivalent to "Basil" in English.
Here, "Василия" is a proper name used in its genitive form to indicate possession or object.
Василия всегда радуется, когда приезжает в гости.
Vasiliy is always happy when he visits.
"Василия" represents a proper noun in the accusative case as the direct object of the verb встретить (to meet).
На улице мы встретили Василия, нашего старого друга.
On the street, we met Vasiliy, our old friend.
Here, "Василия" is used as a proper noun in the genitive case to indicate association or relation.