A FAMILY is desperate for answers after their grandpa traveled 18 hours to attend his grandson’s graduation — but then disappeared.

It’s been nearly two months since Reuben Waithaka, 73, walked out of his son’s house and vanished on May 15.

Before he went missing, Waithaka and his wife, Elizabeth, had flown more than 8,000 miles from their home in Kenya to attend the high school graduation of their first grandson in Alabama.

The morning after they arrived, Waithaka left the family home in Calera, about 30 miles south of Birmingham, at around 11 am.

He hasn’t been seen since.

The doting grandfather missed his grandson’s graduation, which occurred just six days after he disappeared.

“He just got here. And then he was gone,” Waithaka’s grandson, Byron, told CNN.

The doting grandpa was planning on attending the graduation and even packed sentimental gifts to celebrate the occasion.

Pictures of his son at a young age and matching shirts for his son, grandson, and himself were tucked into his suitcase, CNN reported.

His family was seen gathered together in pictures of the graduation as they spoke about the concerning situation in social media posts.

Waithaka’s daughter-in-law, Mary Ngigi Waithaka, wrote in part on Facebook, “Even as our family navigates the worry and uncertainty of my father-in-law going missing this past week, I know he would want us to celebrate this incredible achievement.”

MORNING OF MAY 15

Elizabeth said that on the morning he went missing, Waithaka stepped out of the house and seemed confused, according to CBS affiliate WIAT.

She followed her husband at first, but returned to lock the doors of the house.

When she tried to catch up with him, he was already out of sight.

‘CONFUSED’ STATE

Emily Ann Balua, Waithaka’s daughter, said the patriarch had appeared to be confused about where he was since they arrived in the US, according to NBC affiliate WVTM.

The family said Waithaka might be trying to return to Kenya.

“So, if he asks you to take him to a city, especially to Kamboni, that is where he’s from,” Balua said.

Waithaka was given at least two rides after he left his family’s home, according to the Calera Police Department.

One of the rides was to a Chevron gas station about two miles away from his son’s home.

Surveillance footage from the gas station showed Waithaka walking with his hands behind his back at around 11:48 am.

He waved at the store attendant before walking to a restroom, according to CNN.

Waithaka then left through the back door of the store and hasn’t been seen since.

CPD hasn’t returned The U.S. Sun’s request for comment.

In May, Waithaka’s family urged anyone who sees the missing grandpa to call the police instead of giving him a ride.

“We don’t want him to go any farther,” Balua told WIAT at the time.

She told WVTM, “We’re hoping that if he approaches you for a ride, please don’t give him a ride. Distract him and call the police.”

Waithaka’s family said he hasn’t been diagnosed with any disease that would impair his thinking.

FAMILY’S HEARTBREAK

On June 3, Waithaka turned 73 and wasn’t with his family to celebrate.

“HAPPY 73rd BIRTHDAY To My Father! However it’s hard to spend this joyous day without the man of the day,” his son, Willington Waithaka, wrote on Facebook.

“We all thank you for the continuous support and love we have gotten through these tough days.”

Recently, Willington shared a heartbreaking message about his dad’s disappearance with CNN.

He told CNN, “Sometimes I regret why I asked my parents to come for my son’s graduation. I find myself wondering, ‘What would I have done differently?

“Maybe if I hadn’t invited them, my dad would still be with us.”