My great grandmother Elizabeth Fielder was a twin; to my knowledge there are no twins in any of her descendent lines. However, her sister had twins, and to date I have found 17 other sets of twins in Fielder line from my 2 x great grandparents (ie: from 1815 to present day) from Elizabeth's brothers and sisters.
Not all these were from my great grandmother's sisters lines - 5 sets are in her brother George's line, 2 in her brother John's, although through daughters lines not sons. Some of the lines apparently have none at all, several of the families have 2 sets of twins, Harriet's line has twins in every generation.
I hadn't previously registered - til I read this thread - that although they are all decended from Henry Fielder, only Elizabeth and Eliza are surnamed Fielder