
1) Armstrong colleague 2) Blues singer Ma 3) Ma of blues 4) Ma of the blues 
Found on 
https://www.crosswordclues.com/clue/rainey

Type: Term Pronunciation: rā′nē Definitions: 1. George, English anatomist, 1801-1884. See: Rainey corpuscles, under corpuscle
Found on 
http://www.medilexicon.com/medicaldictionary.php?t=75095

Rainey is a name for girls. The meaning is `peaceful, queen` The name Rainey is most commonly given to American girls. What do they use in other countries? Ray (English) Reggie (English) Regan (English) Rayne (English) Rain (English) Raine (English) Rayn Raelyn (English) Raelynn (English) Reino Raya (Russian) The name sounds like: Rayney, Rainy, Ra...
Found on 
https://www.pregnology.com/names/girls/Rainey
  No exact match found.