Elizabeth McLennan 1786-1858 Applecross

Seeking information on Elizabeth McLennan who married John McGregor 1776-1860. Children were Mary b.1814, John b.1816, Annabel b.1818, Margaret b. 1820, Alexander b.1823, Murdoch b.1826, Catherine b.1828. We know they emigrated to Nova Scotia c.1837 but cannot confirm date or ship, dates and ships are hard to locate. Would like to know who Elizabeth's parents and siblings were