This is the 18108th most frequent Russian word.
хозяев
"Хозяев" means "owners" or "hosts" (genitive plural of хозяин).
In this sentence, "хозяев" is the accusative plural form of "хозяин," referring to home owners or hosts.
Хозяев дома приятно видеть снова.
It's nice to see the home owners again.
Here, "хозяевам" is the dative plural form of "хозяин," indicating recipients of gratitude.
Мы благодарны хозяевам за их гостеприимство.
We are grateful to the hosts for their hospitality.
In this sentence, "хозяевах" is the prepositional plural form of "хозяин," used to denote 'about the owners'.