This specific brooch originated in France where, although uncommon, the majority seem to have originated. A few similar brooches have been found in Britain, but these are most likely to be imports, especially bearing in mind that the rabbit was not brought to Britain until the invasion of the Normans. They differ in style to the hare-type, but stem from the same origin, taking their influence from the flat plate brooches. Such brooches were very popular during the late 1st to 2nd century.
To discover more on Roman and Celtic brooches, please see our relevant blog post: Roman and Celtic Fibulae