This is the 3983rd most frequent Japanese word.
ゼレンスキー
"ゼレンスキー" refers to "Zelenskyy," the surname of Volodymyr Zelenskyy, the president of Ukraine.
In this usage, 'ゼレンスキー' is used as a proper noun referring to a specific individual, President Zelensky.
ゼレンスキー大統領はウクライナのリーダーです。
President Zelensky is the leader of Ukraine.
Here, 'ゼレンスキー' is used possessively with the particle 'の', indicating that the speech belongs to Zelensky.
ゼレンスキーの演説は感動的でしたね。
Zelensky's speech was inspiring, wasn't it?
In this example, 'ゼレンスキー' is the topic of the sentence, discussed globally.