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relong [Malay]

In Malaysia, ? – present, a unit of land area, = 30,976 square feet, approximately 2,870 square meters (approximately 0.7111 acres). Symbol, r. One relong = 484 jemba.

sources

rělong. I. A linear or square measure; an “orlong,” or 1¹⁄₃ acre.

R[ichard] J[ames] Wilkinson.
A Malay-English Dictionary. Part I. (ALIF to ZA)
Singapore: Kelly & Walsh, Ltd., 1901.
Page 334.

If indeed the relong was an orlong in the 19ᵗʰ century, it seems not to have been one in the 20ᵗʰ. See orlong.