A little bit of digging around with phone book/electoral roll information and then Scotlandspeople site:
Oliver William DEBENHAM lives in Edinburgh and is married to Akiko KOBAYASHI (b. c. 1977). I think they married sometime between 2007 and 2013, but I cannot locate it - maybe abroad, or worse, the children may be illegitimate. I suggest two or three daughters and possibly one son:
Mia Charlotte DEBENHAM b. 2006
Rei DEBENHAM (female) b. 2009
Sarah DEBENHAM b. 2011 (these three all in Edinburgh)
Murray John DEBENHAM, b 2012 Johnstone (which is a bit far away)
Any more ideas for searching?