Gertrude of Nivelles was a great friend and hostess to many of the Irish missionaries. She also shares a feast day with St. Patrick. (Belgium is considered a Celtic country*)
We’ve given Gertrude her own blog. Just click to go there for all kinds of interesting information, as well as a prayer circle. 
*Beginning in 57 BC, Julius Caesar extended the power of Rome into the region of Europe that is now Belgium. The people he encountered there were the Belgae, one of the various Celtic tribes of early Gaul, and the Romans dubbed their new province Gallia Belgica. ‑Source: Belgium History