age of the Manx born Wm would help but possibly Wm son of Wm Kermeen + ann kneale might fit - Wm snr a miner in Foxdale in 1841 (Ballalhig in 1841) + possibly same place in 1851 (ballahig is at St John's end of lower Foxdale 2km north of village) - have a look at www.manxnotebook.com/gazateer/foxdalev.htm

Based on reported ages Wm is s/o John Kermeen + Cath Cubbon bapt Patrick 18090604
Ann is possibly d/o John Kneale + Ellinor Kelly bapt Pat 18140904