I have no information on the girls but I know that William Hogg born 2 February 1826, married Margaret Minto Thomson 22 January 1858 in Perth Ontario Canada.
William Hogg and Catherine Bryson's son, William Hogg was born 2 Feb
1822 and baptised in North Leith, Midlothian (as were his sisters, Catherine, Ann and Jean). There are lots of trees on Ancestry that have this William Hogg born on 2 Feb
1826, but I think this must be an error.
There were two William Hoggs baptised in Edinburgh in 1826 - William Hogg, son of George Hogg and Ann Davidson, on 11 Jun 1826; and William John Hogg, son of John Hogg and Janet Fraser, on 23 Dec 1826.
Haven't had any joy finding the rest of the family though - they do appear a bit elusive - and there are a lot of Hoggs in the Edinburgh area. On Catherine and William's marriage record, her father is given as Peter Bryson. There was a Catherine Bryson born to Peter Bryson and Jean Notman on 24 Jan 1784, baptised in Tranent, East Lothian on 22 Feb 1784 who may fit the bill.
Ruth