Oops, silly me.  Father is Thomas Ettridge, a painter.
Here's the full transcript of the cert:
15th Dec 1873
Charles John Ettridge     full age     bachelor     Carver     4 Pimlico Wall     Thomas Ettridge     Painter
Eliza Sarah Ettridge       minor*      spinster         --          1 Pimlico Wall     Edward Ettridge     Fishmonger
married after banns by T(?) H. Wright
witnesses: Thomas Ettridge and Rebecca Farrington.
* Eliz's dob is 10 Dec 1855
I suspect Rebecca Farrington is another Ettridge (though not entirely sure of her parentage yet), as there's a Rebecca Ettridge marrying a John George Farrington (1871, Q2, Shoreditch, 1c, 338; IGI Batch M040371).