Kaye - just to help whilst other information comes to light.
In the 1929 Directory, 1 Cyll Terrace was occupied by John Hobson, a mason. 3 Cyll Terrace was occupied by John Williams, a plasterer.
The Hobsons are quite a large family in Llandudno. For example: on the Great Orme in 1927 there were:
William Hobson, labourer, Wyddfyd Farm
Anthony Hobson, labourer, 4 Wyddfyd Terrace
Mrs Ellen Hobson, 19 St Beuno's Road
John Hobson, 2 Belle View Terrace
John Hobson, Ivy Mount, Tyn y Coed Road
Joseph Hobson, mason, 2 Tan y Craig
All of these are within a short distance of each other.
If you look the Genealogy section of this site and go to page 4, the second item down is "The Llandudno Hobson Family". You may find a lot more information there - including some from Hugo.