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I was told by my grandfather that Samuel Glover (b.1754) was one of four brothers of Pembrokeshire farming family. Samuel went to Surrey/ London (my direct descendant), one went to Ireland (his son may have been John William Glover, grandfather of the famous musician James Mackay Glover), one went to France or Belgium, and one to Scotland. The last may be wrong as a descendant was the composer Stephen Glover who was born in London and whose father was George Glover. 

I am looking to obtain more information on the brothers' parents and origins in Wales and any help would be greatly appreciated!