Yes, Jan Żabiński was the director of the Warsaw Zoo before and during the World War II, which was one of the biggest zoos in Europe at that time. Him and his wife saved 300 Jews by hiding them in their villa and in the zoo itself, for which they were recognized by Yad Vashem as Righteous Among the Nations. 298 of those Jews survived the war.
Jan was also a member of AK (Home Army) in the rank of lieutenant and participated in the Warsaw Uprising of 1944. A street in Warsaw was named after him.
The film about their heroic rescue of Polish Jews is titled "The Zookeeper's Wife" and stars an Oscar winning actress Jessica Chastain as Jan's wife. I've watched it for the first time this week and I can honestly recommend it, especially these days, with war over our border, it feels all too relatable...