The families below are all single parent families with a difference. The parent has never had a partner. All the offspring are produced asexually. The offspring in a particular generation are all the same length (letterwise). The letters are each assigned their alphabetical values (a=1, b=2, etc). Unreferenced words can be found in the Oxford English Dictionary, Second Edition, Locations, identified by country, are taken from The United States Board on Geographic Names.
"The Generation Game,"
Word Ways: Vol. 39
, Article 7.
Available at: http://digitalcommons.butler.edu/wordways/vol39/iss2/7