I see that the tune LANDÅS's tune authority is currently called landas_gretry, and gives Grétry some play as the (attributed) composer. But the evidence appears very weak. The attribution occurs in only four hymnals, three of them published in 1989-1990, two of those by Hope (incl. Tabernacle), and Hope did not copy the attribution to the later Worship & Rejoice. The only later attributions to Grétry are in the Cyber Hymnal™, which I assume to be derivative on this score.
Earlier and later instances generally present the tune as Norwegian folk material arranged by Kirkpatrick.
When I saw "landas_gretry" I thought, "Hmm, must be a different tune; I wonder what they call LANDÅS." Only after checking the text authority for "My faith has found a resting place" did I realize landas_gretry was what I assumed would be called either landas_norwegian or simply landas.
It seems to me that if you're going to call LYONS simply lyons (rather than lyons_haydn on the basis of the ill-founded but ubiquitous attribution to JM Haydn or occasionally to his more famous brother) then you should also call landas_gretry simply landas.
So I'm going to rename it.
Comments
Suggestion: not Grétry
If "landas" is felt to be too short and potentially duplicable a tune name, I would suggest that either landas_norwegian or landas_kirkpatrick would be preferable to landas_gretry.
ACCLAIM
On a related note, I see that ACCLAIM is text-authoritied as acclaim. This strikes me as a much-more-likely-to-prove-ambiguous name than landas, so I'm going to rename it acclaim_german, since all the source attributions I've seen say it's a traditional German melody...