Complex sentence: Her son Mustafa Davut Bey got from Habibe Hanım two sons Hasan and Şaban who take the surname Sarmaşık, since 21 June 1934, when Turkey adopted the Surname Law which required all its citizens to adopt and use Western-style surnames.
Split into simpler sentences: Her son Mustafa Davut Bey got from Habibe Hanım two sons Hasan and Şaban who take name surname Sarmaşık. On 21 June 1934, Turkey adopted the Surname Law which required all its citizens to adopt and use Western-style surnames.