1) English surname 2) Scottish boy name 
MacLachlan is a surname. It is derived from the Gaelic MacLachlainn, which is in turn a patronymic form of the Gaelic personal name Lachlann. ==People== ...
Type: Term Pronunciation: măk-lahk′lăn Definitions: 1. Elsie A., 20th-century researcher. See: Lowe-Terrey-MacLachlan syndrome