Born in 1888 in Koidanov, Minsk Gubernia, White Russia. At the age of about fourteen, he arrived in America where he worked in shops, and at the same time went through high school, became a pharmacist. For a short time he worked as a pharmacist, then studied as a sheep (tson) doctor and practiced as same in New York.

In 1907 he began to print poems and one-acters in "Freie arbeyter shtime", and from 1912 until 1918 he cut short his writing, when he began again with stories that in 1921 were published in New York in book form.

K.'s printed one-acters were:

[1]    A. K-k.
Zey dernentern zikh
["Freie arbeyter shtime", N. Y., 28 December 1907]

[2]    A. K-k.
Tsvey mames (one act)
[same, 11, 18 January 1908]

[3]    A. K-k.
In eyn abend
[same, 25 January 1908]

[4]    A. K-k.
Di gliklekhe (fun arbeyter-leben)
[same, 29 February 1908]

[5]    A. K-k.
A nakht fun hunger
[same, 7, 14 March 1908]

[6]    A. K-k.
Beziegt
(A drama in one act)
[same, 19, 26 March 1910]

[7]    A. Klumak.
Nit fershtanen (one-acter)
[same, 7, 14, 21 September 1918]

[8]    Ayzik Klumak
In fer'khshuften kreyz
(one-acter)
[same, 1, 8 May 1920]

[9]    Ayzik Klumak
Di meyster (comedy) [in one act]
[same, 1, 8 May 1920]

[10]   Ayzik Klumak
Lilis (a fragment)
[same, 17 July 1920]

[11]   A. Klumak
A por folk
(one-acter)
["Forward", N. Y., 31 December 1922]
 

• Zalmen Reyzen -- "Lexicon of Yiddish Literature", Vilna, 1929, Vol. III, pp. 668-669.