For some reason there isn't any sort of information regarding the gods of Alamarri, the only thing I found is:
It could be close to what the Avaar believes in , I think Maferath was Avaar .
The Avaar worship spirits ...also the Alamarri were chased from their lands by a "shadow Goddess" but Solas says it was nothing more than a spirit.
Anyway if you look at Avaar Gods ,
.it seems likely the avaar and perhaps all of the Alamarri were influenced by dwarven and elven myth when they set foot in Ferelden.
Now there's also Tyrdda Bright Axe who followed a path somewhat close to Andraste.She saved her people after hearing warnings by spirits and it seems she had a strange elven lover.
It's unclear what was the deal with the elf , was it a spirit looking like an elf , a somniari , an elven abomination?No clue.
She met some warlord who somehow wanted to go to the Golden City and was hearing whispering.It was way before the magisters went to the Golden City , Tevinter were not an empire back then but the neromian tribe.
It seems for some strange reasons some human tribes in the north fell prey to something bad.
What we know as the Old Gods whispering.
In the south , spirits and someone looking like an female elf was busy stirring people away from this influence.