Jander Parentakis
From Tar Valon Library
A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Author: Atarah al'Norahn
General
Jander Parentakis is a man who is staying at Rand's school in Cairhien.
When Rand visits the school, Idrien Tarsin tells him that Jander believes he can move riverboats with waterwheels off a mill, or near enough, but when he puts enough men into the boat to turn the cranks, there is no room for cargo, and any craft with sails could outrun it.
(Reference: Winter's Heart, Prologue)