1964 - 1971: The Lestrange brothers are children. Rabastan starts school in '71.
1971 - 1978: Rabastan attends Hogwarts. 
1978 - 1980: Adrian, Blaise and Theo are born. Evan Rosier is killed by Aurors in '80.
1981/82: Rabastan and Rodolphus are caught and sent to Azkaban.
1989 - 1991: Adrian, Blaise and Theo begins at Hogwarts.
1991 - 1996: Adrian "meets" Rabastan continuously over a journal.
1993: Adrian fools around with Sarah in May/June.
1994: Valentin is born in February in Russia.
1996: Rodolphus and Rabastan Lestrange breaks out of Azkaban. Adrian meets Rabastan for the first time in real life. Rabastan rapes Ryan's mother. Ryan is born nine months later.
1998: The final battle of the second war takes place at Hogwarts. Theo is caught in the middle and is killed by unknowns. Voldemort is defeated and the war is won. Rodolphus is turned vampire. Rabastan, thinking his brother dead, leaves the country.
2001: Valentin is taken to Britain.
2005 - 2012: Valentin attends Hogwarts.
2008: Adrian and Blaise begin to teach at Hogwarts. Adrian meets Valentin for the first time. Valentin meets Rodolphus and Rabastan seperately.
2009: Adrian and Valentin discover their relation and move into Lestrange Manor. Ryan is discovered and moved to Lestrange Manor.
2015: Valentin travels to Russia with Adrian to reclaim his inheritance. Valentin buys an old bookshop.

Looks okay? I put in what I knew about. Please, add whatever I left out like more info on: Ryan, Nathair, Blaise... :)