My mother was a Quigg from Belfast N. Ireland. Her father was William Quigg (1887) and his father was William Blair Quigg.
Searching for Quiggs I have discovered there are a lot more of them out there than I thought.
I have read in a book on genealogy that the name Quigg is derived from the Gaelic word for "five" which I believe is "cuig".Apparently, in England, some members of the Quigg tribe have the surname "Fivey".
I also read that the Quiggs may have come to Ireland from Scotland.