יהודה ראב
תרי"ח-תש"ח 1858-1948

נולד בהונגריה. עלה לארץ ישראל בשנת 1875 והתיישב בירושלים. בראשית תרל"ט (שלהי 1878), הצטרף לקבוצת רוכשי אדמות פתח תקווה ולחופרי הבאר הראשונה במושבה.
בחנוכה תרל"ט, דצמבר 1878, חרש יחד עם אביו אלעזר את התלם הראשון באדמת המושבה.
עמד בראש השמירה במושבה, והיה שותף להנהגת פתח תקווה עד סוף ימיו.

The sign is one of the signs in the founders’ square in Petah Tikva and commemorates the city’s founders.

On the other side of the sign is a relief featuring Yehuda Rab riding a horse Click for a larger image

The following photo taken that day shows the place of the signs in the square Click for a larger image

The square itself is also on the site Click for sign's details

Near this sign are statues of the other four founders:
Click for sign's details - Yehoshua Stampfer

Click for sign's details - Zerah Barnett

Click for sign's details - Yoel Moshe Salomon

Click for sign's details - Meir David Gutman

All sculptures were created by Samuel Ben-Ami. Here is the label on one of the statues: Click for a larger image

Translation of the text on the sign:
Yehuda Rab
1858-1948

Born in Hungary. Immigrated to Eretz Israel in 1875 and settled in Jerusalem. In late 1878, he joined the group of purchasers of Petah Tikva land and the first well diggers in the colony.
In Chanukah, December 1878, together with his father Elazar, he plowed the first furrow in the colony’s land.
Headed the guard in the colony, and was a partner in the leadership of Petah Tikva for the rest of his life.