On Aoife`s Irish side:
 MATERNAL ANCESTORS
 * O`Sullivans from Tuosist, Co.Kerry, Ireland ca.1830
 * Murphys from Kenmare, Co. Kerry, Ireland ca.1820
 * Grants from Plumstead, London, England ca.1880
 * Murphys from Drogheda, Co. Meath, Ireland ca.1850
 PATERNAL ANCESTORS
 * Havertys from Kilchreest/ Loughrea, Co.Galway Ireland ca.1790  * Mooneys from Kilchreest/ Loughrea, Co.Galway Ireland ca.1820

On Frederic`s Belgian side:
 PATERNAL ANCESTORS
 * Marchands from Arquennes, Belgium ca.1600
 * de Conincks from Sombreffe, Belgium ca.1800
 * Douxchamps from Bioul, Namur, Belgium - ca.1380
 * van der Heydens from Liege and from Tongres, Belgium ca. 1830 MATERNAL ANCESTORS
 * Bockens from Susteren, Limburg, Netherlands - ca.1600
 * Biquets from Leuven(Louvain) and l`Ermitage in Wavre, Belgium ca.1880    
 If anyone can correct or complete information I would love to hear from you.  Many thanks to those who have already contributed.

Of interest on the Irish names: 
 * Mooney is derived from the native Gaelic O`Maonaigh Septs, taken from an    Irish word meaning `wealthy`.
 * Murphy is the most frequently found name in the country and    derives from a number of native Gaelic O`Murchadha Septs.