Question: where did the mac come from in fleetwood mac

title: Fleetwood Mac
text: Soon after this , Green suggested to Fleetwood that they form a new band . The pair wanted McVie on bass guitar and named the band ' Fleetwood Mac ' to entice him , but McVie opted to keep his steady income with Mayall rather than take a risk with a new band . In the meantime Peter Green and Mick Fleetwood had teamed up with slide guitarist Jeremy Spencer and bassist Bob Brunning . Brunning was in the band on the understanding that he would leave if McVie agreed to join . The Green , Fleetwood , Spencer , Brunning version of the band made its debut on 13 August 1967 at the Windsor Jazz and Blues Festival as ' Peter Green 's Fleetwood Mac ' , also featuring Jeremy Spencer . Brunning played only a few gigs with Fleetwood Mac . Within weeks of this show , John McVie agreed to join the band as permanent bassist . 

Answer: answer: The Green and Fleetwood wanted McVie on bass guitar and named the band ' Fleetwood Mac ' to entice him.
 Within weeks of the show at the Windsor Jazz and Blues Festival, John McVie agreed to join the band as permanent bassist .