The entry is from St Mary's Beverley, and the register can be seen at FindMyPast. Unfortunately the BT has not survived, so no comparison can be made.
The word in the margin does look like 'twines', then it looks like Rosa. (The 'R' is different from that in Richard in the line above, but higher up the page, the second entry for September has Robart and Richard in the same line with different forms of 'R'.)
The next word is childe, but with a contraction mark above the 'e', suggesting 'childer', the old plural of child. Then it's 'of Mr William Billips'.
However, looking at the whole page, it seems that the register wasn't always filled in immediately - or very carefully. The Robart/Richard entry I mentioned says he was 'buried the aboute the 8th day'. But down at the bottom of the page is where it gets interesting. After the burial on 24th Nov is this:
Omited in October Richard Roward oatmealman buried the 16 day
Except that he wasn't omitted - the entry immediately above our query is very clear:
Richard Roward oatmealmaker was buried the sixteenth day
So he was entered twice - and there's also a second entry for our query at the foot of the page:
Two children of William Billopps was buried the same day
So my best guess is that two children were buried, one of whom may have been called Rosa. But the twins bit might be a guess, or filled in from memory, as other entries seem to have been (cf the lack of forenames for children). The second entry is possibly an attempt at a correct version - maybe some rough notes went missing, and had now been found? (Though they still don't give forenames, unfortunately.)
