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Twins In Smith Pearce Line

The incidence of twins is 4 in over 100 families (so far in my research) whereas statistically speaking the chance is 1 in 86
(source Encyclopedia Britannica) or 1 in 87 (Encarta)
                                                 _Thompson LANDERS
                                                |
                         George Thompson LANDERS|                                      
                        |                       |                                                                                                 
George ALBERT LANDERS___|                       |
William Ernest LANDERS__|                       |                                                                            
                        |                       | 
                        |_Annie Jane HUNTER     |
                                                |                           _William SMITH                         
                                                |_Elizabeth Ann SMITH______|                  
                                                                           |
                                                 _Stephen SMITH ___________|
                                                |                          |                      
                                                |                          |_Mary Ann WILDER 
                         Alfred Stephen SMITH___|
                         James Andrew SMITH_____|                                                 
                         _Bertie Thompson SMITH_|
                        |                       |
Jean Florence SMITH_____|                       |
Joyce Agnes SMITH_______|                       |                           _William PEARCE
                        |                       |_Agnes May PEARCE ________|                      
                        |_Ruby Ethel MAURER                                |
                                                                           |
                         _Thomas Albert WELLS                              |
                        |                         _Frederick Louis HAYNES  |
Maria Mary WELLS________|                        |                         |                                                                         
Thomas Frederick WELLS__|_Letitia Maria HAYNES___|                         |                                                  
                                                 |_Julia PEARCE ___________|
	                                                                |
                                                                           |
                         _Louisa Day FEWKES                                |
William PEARCE__________|                                                  |
Robert George PEARCE____|                                                  |
                        |                          _Alfred Francis PEARCE__|
                         _William Henry PEARCE___|                         |        
                                                 |___Elizabeth BLOWER _____|
                                                                           |_Maria DALY

Notes:
George and William LANDERS are 1st cousins once removed to Alfred and James SMITH
George and William LANDERS are 2nd cousins of Jean and Joyce SMITH
George and William LANDERS are not blood relations of Maria and Thomas WELLS
Alfred and James SMITH are 1st cousins once removed to Maria and Thomas WELLS
Alfred and James SMITH are uncles of Jean and Joyce SMITH
Jean and Joyce SMITH are 2nd cousins of Maria and Thomas WELLS
George and William LANDERS may be the odd ones out as they are not blood relations to the WELLS twins,
Maria and Thomas WELLS may be the odd ones out as they are not the same sex twins

Links
Twins: A Parents' Guide Jonathon J. Evans, M.D. and Nolan Donovan Evans, R.N.
The Web Site About Twins from Twinspace site
Biology of Twins from Twinspace site
Genetic Epidemiology Unit The Genetic Epidemiology Unit is headed by Dr.John Hopper, NHMRC Principal Research Fellow.
Australian NHMRC Twin Registry

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