holy brothers, sisters, (and bristers)?

i was back at brown a few weeks ago to give a lecture of social variables impacting corporate governance. over shabbat a wonderful pair from Berkeley joined us, Jhos and Julie. I learned some wonderful new niggunim from them, including one especially rocking greek yedid nefesh that jhos adapted from some sort of folk song. jhos is a transgendered spiritual leader who uses the old-skool hassidic title of maggid. Jhos's story was quite compelling but i'll leave that for another time. When we had all finished eating shabbat dinner and had been singing, schmoozing, and telling stories for quite some time people began to wrap up and head home. Jhos and i hugged and i said good to sing with you holy brother. then i worried for a second that i had slipped. jhos said holy brother, holy sister, he didn't care much, the important part was the adjective and it was an honor.
gender binaries can be oppressive. i was re-writing the footer for Jews In The Woods (JITW) e-mails and had written something about "helping your holy brothers and sister". This is disrespectful of people towards the middle of the gender spectrum who don't feel comfortable with the stark distinction between brother and sister. perhaps they aren't identifying as either. how to change? The problem is that the alternatives all sound awkward to me as i say them. holy siblings: something about it just doesn't scan. holy family: maybe it makes me sound like a parent talking to children, maybe its just too Christian, dunno. i am sure why "holy brothers and sisters" is problematic; i just am not really sure what to do about it.

thoughts?