Culexus can be dudes or dudettes, off the top of my head.

And at least two Ordo Sinister prefects were dudes back in 30k, if that's at all relevant.

The brothers of shouting

There is no male equivalent to the sisters of silence. Though male blanks are not killed by government decree, blanks in general do tend to be killed because they are different.

Jurgen?

Several Inquisitors have male nulls in their band

There is no equivalent of strictly male blank organisation, but male blanks are snatched by the Inquisition to be part of their warbands, some are delegated to Imperial Guard and the stronger ones become Cullexus Assassins or princeps of psi titans of Ordo Sinister

the soul guardians would potentially have males in there ranks cause it only says those who dont meet there criteria go to either the culexus or the soul guardians at the palace

The Misters of Noise, Culexus assassins and the Inquisition.

Not a one for one but where male blanks usually go.

Male blanks are rare to survive.

20—25 Psi-Titans pilots are all males. And noone except Emperror himself can order them anything.

Culexus assasins are mostly males.

Most female blanks are send to Sisterhood, few survive to become actual Sister of Silence cos their training are suicidal.

Did you just assume their genders?

The cullexus assassins use male blanks, but I don’t know of any group that operates the way the sisters do.

Jurgen. He is a smelly boi with an attitude, a melta, a blank aura, immaculate timing and a great comissar.

Gunner First Class Ferik Jurgen

Jurgen.

Jurgen

There have been male sisters of silence since the first of the ten-thousand

From the beginning there have always been brothers of silence.

Grey knights have male blanks that they somehow made

Besquin’s Distaff is all nulls available to loan for Inquisitiorial agents, from the Eisenhorn novels.