Artificial intelligent assistant

good-brother

good-brother Sc.
  [See good D 2 b.]
  A brother-in-law.

c 1568 in H. Campbell Love Lett. Mary, Q. Scots App. (1825) 25, I pray you tak it in guid part, & not after the interpretation of your fals guid-brother. c 1610 Sir J. Melvil Mem. (1735) 7 The King of England his Good-brother. a 1670 Spalding Troub. Chas. I (1829) 11 The marquis made him cold welcome for his good-brother the laird of Frendraught's cause. 1715 Ramsay Christ's Kirk on Gr. ii. 119 He was her ain guid-brither.

Oxford English Dictionary

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