These are all of the Costains/ Costeans in my Gawne file. Are you looking for anyone/ any parish in particular?

Catherine Costain m. John Gawne 1778 Kirk German
Elinor Costain m. Thomas Quilliam, daughter Catherine Quilliam 1801 Arbory m. Richard Gawne 1821 Arbory
Elizabeth Costain m. Hugh Clarke, daughter Eleanor Clarke 1831 m. William Gawne 1860 Malew
Richard Costain m. Margaret Ann Preston 1867 Rushen (sister of Jane Preston m. Thomas Gawne 1859 Rushen
Jane Costean m. William Quilliam, daughter Margaret Quilliam 1788 Malew m. Edward Gawne 1815 Santon
Jane Costean m William Gawne 1803 Arbory
John Costean m. Alice Gawne 1734 Rushen

Jane