Gill is a Sikh name
It isn't
only a Sikh name, as the original principal of Gill Airways will tell you... it is actually the name of a clan from the Punjab, and can be found amongst both Sikh and Muslim people (and good old Anglo-Saxons too).
The choice of "Airways" in the name is also curious, exactly the same as the Newcastle outfit. Why not choose "airlines" or "aviation" or something different?
Maybe a coincidence... maybe not.