Siefert, Benedicam Dominus

[steltz]

This page:

Benedicam Dominum (Siefert, Paul)

is titled Benedicam Dominum, but the organ piece is actually a Fantasie on a Benedicam Dominum.

Further, Carus Verlag publishes the piece http://www.carus-verlag.com/index.php3? ... rkID=14978 but if I understand their page correctly, they indicate that it is on Orlando di Lasso's Benedicam Dominum?

The Lasso Benedicam Dominum that we have is here: Benedicam Dominum (Lassus, Orlande de).

1) Should the Siefert page rather be titled "Fantasie"?
2) Can anyone tell me whether the Lasso is the actual source of this? If it is I can do a link between the two pages, but quite honestly, I don't see an obvious connection.