This is the 16931st most frequent Russian word.
сони
"Сони" (plural) refers to dormice, small rodents. It can also mean "sleepyheads" colloquially.
In this sentence, 'сони' refers to dormice, small rodents, and is used as a subject to describe their behavior.
Сони всегда спят в дуплах деревьев.
Dormice always sleep in tree hollows.
Here, 'Сони' is a proper noun used to refer to the Japanese multinational corporation Sony.
Сони - это название известной японской компании.
Sony is the name of a famous Japanese company.
In this sentence, 'соня' (derived as 'сони' in plural or playfully) is used as a nickname to describe someone with habits like sleeping early.