Keera,
I see that your request was made quite some time ago so perhaps you have already been given more information about William MIDDLEMISS and family, or have found it out yourself by purchasing (viewing/downloading) certificates and census entries from (the pay-per-view) site ScotlandsPeople at:
http://www.scotlandspeople.gov.ukFrom the IGI (in the light of the information kindly provided by 'middlemiss'):
Isobel MIDDLMASS m James KING, 1 Jun 1834, Blackford Perthshire
They had - all in Blackford - Andrew (1835), Marjory (1837), William (1839), Eliza (1843), David (1845), John (1847), Janet (1849), and Charles (1851).
If they followed Scots naming patterns that might suggest that James's parents were Andrew & Eliza, and that Isobel's were William & Marjory (though of course it might not be the case).
There are a number of other MIDDLEMISS (however spelled) marriages and births in Blackford.
Perhaps you aren't aware that ScotlandsPeople is not a
subscription site so, unlike the situation with England & Wales,
in general kind RootsChatters can't just spend their
time kindly looking up census information - they'd have to pay! SP is a
pay-per-view site - charges are reasonable and the information on Scottish certificates is excellent (statutory registration started in 1855).
JAP