Let me try to recall. Ironically, the PAP was supposed to be called SDP, but a couple of young Chinese helpers suggested the name to LKY. This is in LKY memoirs. For the WP, Marshall wanted a true party that represented the workers, which was why the earliest WP constitution required a third of the leadership to be unionists. The SDP name was chosen because Chiam believed in a party that fought for real democracy. The Barisan was formed on socialism background, that was why it is called Socialist Front in Malay. For the NSP, it was formed out of some leaders of various parties - Soon Kia Seng of SDP, Kum Teng Hock of WP, Tan Chee Kien of SUF, others from the 3 and UPF etc. Interestingly, being a second home to those who left their first parties is a NSP tradition that continues until today, which some of those within proudly showcases themselves as a diverse and inclusive party.