Sounds like a misleading post seen on bubblews.com that Dawn and Bamboo are siblings.

Dawn Zulueta and Bamboo are Siblings

They may have little similarities but definitely they’re not siblings. Dawn Zulueta in real name, Marie Rachel Salman-Taleon-Lagdameo was born in Luzon. Her parents are Mrs. Maria Cleofe Salman-Taleon and Mr. Jose Fazil Taleon. On the contrary, Bamboo in  real name,  Francisco Gaudencio Lope Belardo Mañalac,  is  from a well-known and influential family in Mindanao.