Dr Mohamed Ibrahim's lineage

This is a YouTube video on Prof Ahmad Ibrahim, the eldest son of Dr Mohamed Ibrahim bin Shaik Ismail.
http://www.youtube.com/watch?v=hG3PyCAUki8&feature=related 

These are the male names known in Dr Mohamed Ibrahim's lineage: 

First generation (G1)
Shaik Ismail Ballah (c1843-1928) - an archivist with the German Embassy in Singapore since 1892 till his death; his details are published in The Straits Times. 

Second generation (G2)
Dr Mohamed Ibrahim bin Shaik Ismail (1892-1962) - a medical doctor; his details are published in The Straits Times. 

Third generation (G3)
Prof Ahmad bin Mohamed Ibrahim (1916-1999) - a lawyer; served Singapore and Malaysia; popularly known as Prof Ahmad Ibrahim, founder of law faculties for UM and UIAM; his details are widely published. He was involved with the talks for the creation of Malaysia between 1960 and 1963, merging Singapore with Malaysia. 
http://eresources.nlb.gov.sg/infopedia/articles/SIP_529_2005-01-07.html 
http://en.wikipedia.org/wiki/Ahmad_Mohamed_Ibrahim

Fourth generation (G4)
Dr Mohamed Tahir bin Ahmad Ibrahim - medical doctor; popularly known as Dr Mohamed Tahir bin Ahmad or Dr Tahir. He is not the oldest Malay doctor in Singapore today (born 26 April 1944). There are 5 others who are older than him who are practising in Singapore. He still practices at the Crescent Clinic and Surgery, Eunos Crescent, Singapore. 
http://www.sma.org.sg/membership/DirectoryDoctorDetail.aspx?ID=1814 
http://www.darul-arqam.org.sg/embracing-islam/circumcision/  http://www.accordingtopatients.org/singapore/22056/medical-doctors/mohamed-tahir-bin-ahmad/

Fifth generation (G5)
Iskandar bin Mohamed Tahir - a lawyer in Kuala Lumpur
Ibrahim bin Mohamed Tahir - an editor and bookstore owner (Wardah Books in Bussorah St) in Singapore

Sixth generation (G6)
Sons of Iskandar and Ibrahim Tahir.