Joseph Randall

RUN-away from the subscriber the 10th of May. one Joseph Randall, a tall trim built fellow; had on when he went away a blue coat, velvest wasit-coat and breeches, mixed coloured stockings, and wore away two felt hats; he rode away a black horse and led a sorrel horse; he is supposed to be lurking in the fourth part of Scantick after a strumpet that he has spent the most of his time with for three years past. Whoever will take up said Randall and return him to me shall have three coppers reward; but whoever will take the trouble to keep him away shall have Ten Dollars reward and all necessary charges paid, by me SUSANNA RANDALL. N.B. All persons are forbid harbouring him, for I am determined to maintain him no longer. Ellington, May 26, 1788.

Shared last name. What was the relationship between runaway and subscriber? What does "to keep him away" mean? What is the deal with this "strumpet"?