Origen of Macarro

[djmac]

I have been researching the Origen and meaning of my surname, Macarro, and have so far found two possible solutions

1. It comes from a Scotish family named McArrow (which is how most native english speakers pronounce my name), who moved to Extremadura and whose name was Castellanized

http://www.misapellidos.com/ver_datos.phtml?cod=42135

or

2. It is from a greek root Macar with an -o ending, meaning blessed

http://www.phthiraptera.org/Classical%2 ... cal_M.html (first one)

Which one do you feel is most likely or do you have any other ideas as for its meaning/origen?