Warlock's Heirs Series by Christopher Stasheff

Confident in her power as daughter of the High Warlock, Cordelia Gallowglass decides she can take her time deciding whether to accept Prince Alain's offer of marriage, until she finds out she has enemies who oppose the union.

A young, brave warlock's son finds his loyalties divided between two women, including the beautiful bandit Quicksilver, who has stolen a lord's land for herself, and the sultry witch Moraga, who will do anything for the throne of Gramarye.

SINGLE WHITE WITCH SEEKS ROMANCE AND ADVENTURE (BROOMSTICK OPTIONAL) Cordelia Gallowglass has the planet Gramarye at her feet. Her father is High Warlock, her mother's the powerful witch in the kingdom - and she's inherited awesome talents from both of them. On top of that, Prince Alain, heir apparent to the throne, has come asking for her hand. What more could a young woman - witch or not - want? Plenty! The wild young lady isn't sure she's ready to settle down... moreSINGLE WHITE WITCH SEEKS ROMANCE AND ADVENTURE (BROOMSTICK OPTIONAL) Cordelia Gallowglass has the planet Gramarye at her feet. Her father is High Warlock, her mother's the powerful witch in the kingdom - and she's inherited awesome talents from both of them. On top of that, Prince Alain, heir apparent to the throne, has come asking for her hand. What more could a young woman - witch or not - want? Plenty! The wild young lady isn't sure she's ready to settle down. Cordelia decides she can take her time deciding whether to accept the Prince's offer of marriage... until she finds out she has enemies who oppose the union, and intend to ensure she never makes it to the altar - ever. less

Gregory Gallowglass is the eligible bachelor on the planet of Gramarye. The youngest son of the High Warlock Rod Gallowglass and the witch Gwendolyn, his powers of intellect and magic are without equal. But he's best known for his pure heart -- one that is impervious to love. To Moraga, sworn enemy of the Gallowglass family, Gregory's heart is the ultimate challenge. Through her spells, she will bring him under her power -- and then destroy him...