Could this be him in 1911?www.familysearch.org/ark:/61903/1:1:QYDD-N7T2
There is a marriage in 1911 of William George Browne, his father George is a gardener.Different address from the census but he could have changed jobs.https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1911/09949/5617067.pdfAnd he signed without the e on Brown.