"Jandina" (I, II, III, IV, V) was the name of all five of the P-38's Jay T. Robbins flew during WWII. The nickname stood for his nickname "Jay" and his wife's "Ina", joined to "Jandina".

By the way, Robbins pronounced Jandina as if in Spanish, ie "Juandina." This info comes from Jay Robbins son, Lt Col Robbie Robbins, a fellow F-16 driver and fellow former 80th FS member.

Major Edward Cragg's first assigned combat aircraft was a P-39 fighter (# unknown) which he nicknamed "Porky I." When the 80th Fighter Squadron re-equipped with P-38 aircraft, he was assigned P-38H #42-66506, nicknamed "Porky II." He made his last 9 kills in this aircraft.

To honor Major Cragg, the Planes of Fame Museum acquired P-38J #42-103988, "Jandina III" and painted it with the colors and numbers of "Porky II" in 2003. In 2006, these markings were changed to reflect those on the aircraft "Skiddo 162" flown by J. Dahl Perry, a 475th Fighter Group pilot from the Southwest Pacific.

P-38H-5-LO Lightning "Jandina" Serial Number 42-668?? 
P-38J-10-LO Lightning "Jandina II" Serial Number 42-67590 
Crew Chief S/Sgt. Devereaux 
P-38J-15-LO Lightning "Jandina III" Serial No 42-103988 
P-38J-15-LO Lightning "Jandina IV" Serial Number 43-28832 
Crew Chief S/Sgt.Mosback. 
P-38?? "Jandina V" 

"Jandina III" lost nose wheel hydraulics after May 7, 1944 mission. Pilot Robbins, was told to crash land at Yamai, near Saidor. At the time of its loss, "Jandina III" had 19 kills. The aircraft was abandoned at Bilau on oil drums until 2002. The 19 kills were cut out and missing from the nose. All that was visible was the name of the crew chief.
Recovered by Australian group known as '75 Squadron' (no association with the RAAF unit). The wreck was reportedly dug up while the group was recovering aircraft scrap from Finchafen. It was identified as the historically valuable "Jandina III" from remains of the nose art and kill markings on the nose. The aircraft was containered at Lae, and shipped to Melbourne, Australia. Soon afterwards, transported by road thru Melbourne, and then containered and shipped to California, along with (possibly) P-38F 42-12652 and three Thunderbolts, and P-47 42-75284, P-47 42-22521, P-47 42-8074.

The current whereabouts of this aircraft are unconfirmed. Reportedly, it was purchased by Paul Allen's Flying Heritage Collection and being restored by Westpac Restoration in Rialto. It is also unclear if this aircraft was legally or illegally exported from PNG.

Frank Olynyk who has researched basically all US fighter records states that Robbins claimed his first three victories with 
P-38G 43-2382 and eight more in P-38H 42-66820, 
Looking in other various books/Internet he was then probably assigned his first J-model 42-67590 which was named Betty. After that I only have 42-103988 Jandina III and 43-28832 Jandina IV. So if we don't have any P-38's named Jandina I and Jandina II, the Jandina III is Robbins fourth Lightning and Jandina IV his fifth.