Dictionary of Family Names

DALRYMPLE.   Taken from the lands and barony of Dalrymple, in Ayrshire, Scotland.  The name is said to be a corruption of the Gaelic Dale-roi-milleadh, which signifies "the valley of the slaughter of kings," and the place was so called from a battle fought there before the Christian era, in which two kings, Fergus and Coilus, were slain.  According to others, it signifies "the valley of the crooked pool."  I think the name signifies "the valley on the margin of the pool," from the Welsh dol, a valley; rhim, the edge or border, and pwll, a pool.  It is very nearly the same in Gaelic; dail, a vale, troimh, by, along the whole extent, and poll, a small lake.