Hello Howard,
I had a look at the extracts of Griffith's Valuation of Limerick which took place in 1853. These are on John Hayes failteromhat.com website.
There were only three Lawrence families in Limerick at that time ... in fact it looks like one with three properties.
George Lawrence, Killinane Vil, Lowestown, Galbally
George Lawrence, Killinane Vil, Lowestown, Galbally
George Lawrence,. Killinane Vil, Lowestown, Galbally
Christopher