Which preposition to use with rach

in Occurrences 1%

Charlie quite lost his appetite for supper in consequence of his approaching trials, and, laying aside his books with a sigh of regret, sat listlessly regarding his sisters; enlivened now and then by some cheerful remark from Caddy, such as: "You'll have to keep your feet cleaner up there than you do at home, or you'll have aunt Rach in your wool half a dozen times a day.

Which preposition to use with  rach