Lejzer Romanowski

The following story on the Lachva ghetto mentions Lejzor Romanowski:
https://encyclopedia.ushmm.org/content/en/article/lachwa.
An excerpt:
Beginning in January 1942, Jewish youth organized underground groups, with the first group of 5 youths coming together under the leadership of Isaac Roszczyn, the head of the Revisionist Betar youth group. Soon five more groups of 5 formed, bringing the total of underground members to 30. Other members of the resistance included Asher Hafets, Hersz Migdalowicz, Icie Slucki, the brothers Fajnberg, Lejzor Romanowski, and Lopatkin