there is a synopsis of will of his wife Archd will 1689 #18 Marown, of Christian Cretney als Fargher: died 20 Dec 1689: husb Oates Cretney; son William Cretney; dau Jane Cretney; 3 children Phinlo & John & Jane Cretney exec (all underage)
(www.manxnotebook.com/famhist/wills/smy168x.htm
looking at actual will may provide a little more (eg dates at which each came to full age)
There does not appear to be a will for Oates which is a little suprising.
The IGI entries for Marown under the batch number C038221 (like several other parishes) look as if they have been replaced by other entries (see my comments at www.manxnotebook.com/history/demog/as.htm) - I havn't looked at the actual regs so don't know the full details of the messup made