L. was born in 186... in Włocławek, Poland. His parents He is the older brother of Shmuel Landau. He became excited by the Yiddish theatre during the guest-starring of Jacob P. Adler in Poland. According to a poster [in the archives of the Yidishn artistn fareyn in poland], one can see that on 9 September 1888 L. had acted in the Warsaw theatre "Buff" as "Comissar" in Sheikovitsh's play "Der treyfniak" (the troupe was composed of Adler, Fishkind, Tanzman, Tabatshnikoff et al.). [Apnis], that of small roles, L. soon went over to greater singing roles, because according to a second poster [in he same archive] of 21 March 1889 in Sosnowiec, L. already acted in he title role of "Bar Kochba" (with Tanzman and Shliferstein).

Of Yiddish theatre, L. went over to the Polish operetta of Koshtshelski in the Lódz Victoria Theatre. Here he performed under the name of Roman Klekoy. Then he went to Warsaw where Prof. Horbovski heard him, and he soon took him into the conservatory. L. came quickly out out to Warsaw in the Polish opera in such roles as "Amonasro" in "Aida" et al.

So that he would avoid conversion to Christianity, L. fled from the Polish opera, went out to Italy and entered into the Milan Opera. Then he acted in various opera theatres in Europe, and in the end he traveled to America, where he entered into the Metropolitan Opera.

In 1914 L. passed away in New York.

From his brother Shmuel Landau.