I'm delighted that my theory of his marriage no.1 turned out to be correct!

Brian Lawson's birth regts have GELLING, Edward Frank, b.23 Apr 1879 Douglas (no) 235 [father] GELLING, William Paul, [mother] COWIN, Ellinor Jane.

Is this the Edward Frank who went to Australia? You didn't give dates.

Familysearch has them in the 1881 census as:
William P. GELLING Head M Male 56 Arbory, Isle of Man, England Tobacco Manufacturer
Eleanor J. GELLING Wife M Female 44 Douglas, Isle of Man, England
Anne GELLING Daur U Female 17 Douglas, Isle of Man, England Pupil Governess
John A. GELLING Son U Male 15 Douglas, Isle of Man, England Scholar
W.Clucas GELLING Son Male 11 Douglas, Isle of Man, England Scholar
Richard D. GELLING Son Male 9 Douglas, Isle of Man, England Scholar
Emily C. GELLING Daur Female 6 Douglas, Isle of Man, England Scholar
E.Frank GELLING Son Male 1 Douglas, Isle of Man, England
Catherine I. CHRISTIAN Serv U Female 29 Rushen, Isle of Man, England General Servant (Domestic)

Source Information:
Dwelling 10 Auckland Terrace
Census Place Douglas, Isle of Man, Isle of Man
Family History Library Film 1342347
Public Records Office Reference RG11
Piece / Folio 5605 / 72
Page Number 23

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