This is a game where you can find your own names, as long as they all fit a particular style. You can pick any language or usage you want, although you will probably be happier if you are familiar with the country and its people.
First are the grandparents, who have old-fashioned names, ca. 1880-1900. Pick last names that suit them.
DH:
DW:
*****
And last of all an Admiral came,
A terrible man with a terrible name,—
A name which you all know by sight very well;
But which no one can speak, and no one can spell.
Robert Southey, "The March to Moscow"