The Pursuit by Johanna Lindsey

What was to be a grand adventure for Melissa Macgregor - an escape from the wilds of her Scottish home into the whirl of the London social scence - seems to pale before the promise in the passionate gaze of Lincoln Ross Burnett. Though they exchange but a few words before parting after a chance encounter on her grandfather's lands, Melissa instantly knows this bold stranger is her destiny, while Lincoln realizes his heart has been claimed forever and he will never be complete until Melissa Macgragor is his bride.

But there are serious obstacles impeding the well-smitten Viscount Cambury's pursuit of glorious romance: sixteen of them - all big and brawny, six named Ian and all named MacFearson. The bane of Lincoln's youth, Mellissa's stifling disapproving uncles are now determined to rob him of his newfound happiness. Yet he is equally recolved to confront the peril - and to pursue his exquisite obsession all the way to London ... and to the ends of the earth, if necessary.