Margaret McEllistrim

her family (also shopkeepers in Ballylongford) didn't want her to marry him,

she stayed in Ballylongford, set up shop with him (i.e. continued Rahilly family business), just down road from her own family shop (McEllistrem's),

she had a great head for business, and took all the local business from McEllistrem's shop down to Rahilly's shop, the McEllistrems grumbled about this into the 20th century,