Wladimir, I was wondering also if it was an independent glyph. But if it is, it is rare.
In the examples that you posted, the EVA-e and EVA-2 look to me like they might be pen-fill (unintentional blobs) but I am not sure about 114r. It looks like it might be deliberate. 78v I am not sure. It might be a blob.
What is interesting about the filled-o on f114r and, the one f24r , is that if it were originally "o" (before it was filled), there would be two "o" characters in a row and, in general, the "oo" combination is less common (only once every few pages) and it is usually after a single character in a vord. But in the filled examples on 114r and 24r it "breaks" that pattern (there's more than one char before it).
In the examples that you posted, the EVA-e and EVA-2 look to me like they might be pen-fill (unintentional blobs) but I am not sure about 114r. It looks like it might be deliberate. 78v I am not sure. It might be a blob.
What is interesting about the filled-o on f114r and, the one f24r , is that if it were originally "o" (before it was filled), there would be two "o" characters in a row and, in general, the "oo" combination is less common (only once every few pages) and it is usually after a single character in a vord. But in the filled examples on 114r and 24r it "breaks" that pattern (there's more than one char before it).