This is the 9118th most frequent Polish word.
swiatłana
"Swiatłana" is a Polish feminine given name, equivalent to "Svetlana" in English, meaning "light" or "luminescent."
Here, 'Światłana' is used as a proper noun, referring to the name of a person.
Światłana ma na imię kobieta, której pomogłem wczoraj.
Światłana is the name of the woman I helped yesterday.
'Światłana' is again used as a proper noun, functioning as the subject of the sentence.
Światłana zauważyła, że książka leży na stole.
Światłana noticed that the book is lying on the table.
In this sentence, the root word 'światła' (light) might be explained, but there's no direct use of 'Światłana' as in name context.