Original sentence: Anstruther-Gough-Calthorpe; Cave-Brown-Cave; Elliot-Murray-Kynynmound; Heathcote-Drummond-Willoughby; Vane-Tempest-Stewart) have triple-barrelled surnames (created when a double-barrelled husband married a single-barrelled wife, or vice versa).Nowadays such names are almost always abbreviated in everyday use to a single- or double-barrelled version
Edited sentence: Anstruther-Gough-Calthorpe; Cave-Brown-Cave; Elliot-Murray-Kynynmound; Heathcote-Drummond-Willoughby; Vane-Tempest-Stewart) have triple-barrelled surnames (created when a double-barrelled husband married a single-barrelled wife, or vice versa); but as triple-barrelled surnames are impractical and are nowadays seen as particularly pretentious, they are almost always abbreviated to a single- or double-barrelled version