Andrew Gavallan is a character from James Clavell's Asian Saga who appears in the novels Noble House and Whirlwind.

Gavallan is a member of Struan's inner court and an aspirant to the office of tai-pan. He is married to Ian Dunross' sister Kathren.

In Noble House, Gavallan works in Hong Kong with the other members of the inner court. When the tai-pan Ian Dunross learns that the North Sea may soon be wide open for oil exploration, he sends Gavallan to Scotland to quietly buy up real estate in Aberdeen so they are positioned to take advantage of this trend.

The North Sea oil rigs, once built, are serviced by helicoptor, which leads to Gavallan being involved in the helicoptor and oil services industries. These become main business ventures of Struan's in Iran during the 1970s, as depicted in Whirlwind.