@Sue127, you might also try Utreia (and Suseia).
I first encountered this song at dinner on my first night after starting from Le Puy-en-velay and for a few days afterwards.
This reference may also help with background:
https://liturgy.co.nz/ultreia-et-suseia
A close friend (who reads the classical Roman writers in their own words) could place the phrase as most probably a later ergot as the romance languages (Italian, French and Spanish) were developing.
When I stopped at Manciet about a fortnight later my host was a former professional rugby player. We had a happy two meals, even with not much language in common our common national game gave us a bond. When the time to leave came in the morning I said "Allez les Bleu" (Go the Blues - the name of the French national team): he beamed from ear to ear. When he got over his appreciation I added "Allez ultreia les All Blacks" (Go further the All Blacks). He then frowned but still shook my hand gently as we parted. Sadly I see his gite d'etape in Manciet has been sold and no longer operates.
And later, after Najera (if memory serves) it was inscribed on distance markers along the way. So the sort of Latin that served in both France and Spain.
And those who have heard the Olympic motto will recognise Ultreia in
Citius, Altius, Fortius (faster, higher, stronger) (we may be not the faster bit). And the ideals the founder of the modern Olympics of:
"The most important thing in the Olympic Games is not to win but to take part, just as the most important thing in life is not the triumph but the struggle. The essential thing is not to have conquered but to have [done] well." according to an apparently well documented piece from Wikipedia. For us walkers the journey (taking part) is often as, or more, important than reaching Compostela or Rome or Whithorn.
Kia kaha (take care, be strong, get going when you can)
Thank you so much. I love the way that one simple question can lead to so much new knowledge. Certainly, onwards and upwards is a phrase that I’ve always known and used, without thinking about a deeper meaning.