  We present a low-frequency imaging study of an extended sample of X-shaped
radio sources using the Giant Metrewave radio telescope (GMRT) at two
frequencies (610 and 240 MHz). The sources were drawn from a Very Large Array
FIRST-selected sample and extends an initial GMRT study at the same
frequencies, of 12 X-shaped radio galaxies predominantly from the 3CR catalog
(Lal & Rao 2007). Both the intensity maps and spectral index maps of the 16
newly observed sources are presented. With the combined sample of 28 X-shaped
radio sources, we found no systematic differences in the spectral properties of
the higher surface brightness, active lobes versus the lower surface
brightness, off-axis emission. The properties of the combined sample are
discussed, including the possible role of a twin active galactic nuclei model
in the formation of such objects.
