in hindi we address people agewise , to elder people we say " aap " , to same age or younger people " tumhara" , without respect says " tu or tera " . so in your sentence it will be " aapka naam kiya hai " - for elder. " tumhara naam kiya hai "- for same age or younger age . Now in here as u said " tera naam kiya hai "- asking without giving respect . GOT IT ? meaning is same , but addresing people differ to people .