This is the 10087th most frequent Japanese word.
道夫
"道夫" (Michio) is a Japanese male given name meaning "man of the path" or "man of the way."
In this sentence, '道夫' is used as a proper noun, referring to a person's name.
道夫は公園でジョギングしています。
Michio is jogging in the park.
Here, '道夫' is discussed as a common name in Japan.
道夫という名前は日本で珍しくありません。
The name Michio is not uncommon in Japan.
'道夫' is used as the subject to ask about someone's acquaintance with this individual.