relationship in genealogy a r. usually refers to one between people; a r. may be familial without regard to gender, e.g., parent, child, spouse, step-child, or gender specific, e.g., father, daughter, wife, step-mother, brother-in-law; most r. terms in English are ambiguous, e.g., one usually has multiple siblings or grand-fathers; a r. may also be non-familial, e.g., friend, sponser; [Cf. RLG Chapter 1, §6 ¶6]; a r. is an element of a propagation rule