Orgelbuchlein Chorales

I recently bought a book called "The (Really) Little Organ Book" by Allan Mahnke. It is published by Concordia and is a manuals only collection. The title intrigued me because of Bach's collection and connection.

Allan has arranged hymn tunes in the style of the Bach chorale from the Orgelbuchlein.

Below are the pieces I've played and the organ chorales that associate with Bach Orgelbuchlein.

1). O Filli Et Filiae- Christ lag in Todesbanden
2). Omni Die- O Lamm Gottes
3). Gethsemane- Liebster Jesu
4). Lobe den Herren- Vom Himmel Hoch