then   
amin' izay
then, at that time [Hallanger 1973]
amy
àry
then, as aoka ary, Well then, be it so: Ataovy àry, Do it then. It can easily be distinguished from the conjunction ary by never being the first word of a sentence. [Richardson 1885]
bakeo
dia
probably the same as dia: step, and used originally to indicate the next step in the narrative, etc. and, and so, then, even, in the next place. It is used to complete phrases, as: Ary nataoko, dia vita izy (And I did it, and so it was completed) [Richardson 1885]
fainy
ndreka
then. This word is generally used with akory. [Richardson 1885]