  The excellent sensitivity and optimum resolution of LoTSS DR2 at 144 MHz has
enabled us to discover a giant radio galaxy (J1225+4011) with three distinct
episodes of jet activity, making it a member of a class of objects called
triple-double radio galaxies (TDRGs). The source extends overall up to 1.35 Mpc
in projected size, with the second episode extending to 572 kpc, and the inner
episode to 118 kpc. J1225+4011 is only the fourth radio source showing a
triple-double radio structure. All four sources have overall sizes greater than
700 kpc, making them giants. We also present the LoTSS 144 MHz map of the TDRG
J0929+4146 and report its updated size. Lastly, we have summarised and
discussed the radio properties of all TDRGs for the first time to understand
their growth and evolution. Our observations suggest that the power of their
jets may decrease with time.
