"A Law Dictionary, ...." - author John Cowell, published 1708
Magbote/Maegbote - A recompence for the murder of one's Kinsman or Kinswoman
As such had hoped that somewhere Kinsman/woman was defined legally but no joy.
Originally, the term "pertinens" was used for kinsman/woman (Leg, Canute Regis, M.S, cap 48) - from the Latin meaning "to extend, stretch out, belong, relate, pertain, have concern"