Not typical Dutch names, you're looking for! Anyway, it's a good idea to visit the site of the municipal archives of Rotterdam (http://www.gemeentearchief.rotterdam.nl
) or http://www.digitalestamboom.nl
, which is a collection of indexes of the municipal archives. Another index is http://www.genlias.nl
On the Rotterdam site I found a reference to
Rotterdam, marriage record, 19 Jan 1870, nr. 15 (A0009v)
Daniël Cullens, born in Rotterdam, 51 years old, son of Daniël Cullens and Neeltje Blijgeest, marries
Petronella Heessels, born in Oisterwijk, 49 years old, daughter of Jacobus Heessels and Cornelia Lesius.
If I stretch my imagination almost to breaking point, I can imagine that Blaghurst = Blijgeest. Neeltje is a common short for of Cornelia.
The Cullen - Blijgeest marriage was also found:
Rotterdam, 29 Nov 1815, nr. C72
Dennis Cullen, 20 years old, born in Rotterdam, son of Thomas Cullen and Jane Bucly, marries
Neeltje Blijgeest, born in Rotterdam, 27 years old, daughter of Cornelis Blijgeest and Cornelia Vermeulen.
It would be even better if Cornelis Cullens's birth would have shown up in the index, but since his father was sailing on a ship (and probably his wife lived on the ship, with him), Cornelis could have been born anywhere.
If you look up the real records, they'll probably give more information, like the profession of the bride and groom, whether their parents are still alive, etc.
On that site, you will also find the birth record of Daniel (the son) in 1818, but