The title comes from the file name, but Dan Froelich explained that the file names were in fact the proper full titles.
Jill of the Jungle: Jill Goes Underground (DOS)
In the second game of the series Moby Dick song is played in "The Waterworld" (levels 11 and 12).
The file in the game folder is named MOBYDICK.DDT.
Onesimus: A Quest For Freedom (DOS)
The file in the game folder is named SONG9.ARK