Benjamin WEBB (1842-94) and Caroline WEBB nee WEBB (1848-88) of Raywood and later Mologa, Victoria, Australia were my great grandparents. They met when Benjamin selected land across the road from Caroline's brother John WEBB (1840-1918), in the land parish boundary of Hayanmi and Mologa in 1868. Benjamin was born at Hillfoot House, Beenham, Berkshire, England and I believe Caroline was born at Killenmore House, Geashill, Offaly (Kings County) Ireland.
Benjamin had an older brother Robert Elisha Thomas WEBB (1833-96) who migrated to Victoria, Australia in 1852/53 and Benjamin followed in 1865 on board the City of Melbourne. Benjamin settled at Raywood in the late 1860s, working with Robert's brother in law David WOOD (1833-71) who was (one the town's first?) blacksmiths. Robert WEBB settled at Kingower and later Rheola as a baker.
Caroline came with her parents and five siblings on board the Great Britain in 1858/59. Caroline's parents, Richard (1813-71) and Maria WEBB (1815-1901) first settled at Spring Hill, south of Kyneton and then between 1867 and 1871 their extended family moved to Naneella and Echuca South.
There are six registered WEBB vs WEBB marriages in Victoria, Australia prior to 1888. These represent three ceremonies and six WEBB persons. Their other two couples were marriages whereby a widow or widower married a brother in law or a cousin of their former spouses.
Benjamin and Caroline's marriage certificate clearly states "of no relation". Benjamin's family originate from Chapel Row, Bucklebury, Berkshire from the earliest parish records in 1539.
Richard WEBB (1813-71) had three siblings (or descendants there of) who migrated to Australia. The first was niece Charlotte Elizabeth WEBB (1831-1907) who travelled via Adelaide in 1952 and married in 1854 to Thomas Thomas RUNDLE. This family settled around Sedgwick, Victoria and later Kerang. Charlotte's parents (Joseph Bloomfield WEBB 1808-79?) and their three sons stopped in Victoria on route to New Zealand in 1864, when they settled in Hamilton, North Island. Their remaining sister and six nephews/nieces settled in Melbourne and around Spring Hill, Kyneton, Victoria (and later Cohuna and Sydney, NSW) shortly after 1860.
Richard WEBB's (1813-71) parents were reputedly John WEBB and Catherine BLOOMFIELD.
I believe this Irish WEBB family has some connection to Major St Laurence WEBB who settled near Indented Head in 1840 and Richard Ponsby WEBB, who are descendants of a George WEBB (died 1800) and originally from Trumpington, England.
Joseph Bloomfield WEBB (1808-79?) was married to a woman whose maiden name was DUDLEY. This name appears several times in the above mentioned family and one of Benjamin and Caroline WEBB's children lived next door to a descendant of this family in Geelong around 1918, however to date I can find no defined link.
This same family had a number of sons who were in the British Army and Richard WEBB's (1813-71) father in law was William TELFORD (1796-1973) of Clara, Offaly and later Dublin and he was also a commissioned officer (Major) in the army. Perhaps Richard WEBB and Maria TELFORD married abroad?
Both Caroline and Benjamin WEBB's ancestors were very much protestant, but if they were connected, this connection was well prior to 1750.
Hope that clears things up.