I need the term for a guy who does what Pok does.

The nearest English term is probably valet, but that often implies someone who parks cars.

Depending on exactly what Pok does, other possibilities are:

    Manservant — old-fashioned, a male domestic servant who handles many personal tasks.

    Factotum — a person who does a wide variety of jobs; "jack of all trades" in service to one employer.

    Personal assistant — modern term if he handles errands, appointments, and organization.

    Attendant — someone who assists a particular person.

    Major-domo — chief household servant, if he oversees a property or other staff.

    Caretaker — if he mainly looks after you and the property.

    Companion — if part of the role is simply accompanying you and helping with daily activities.

    Retainer — an old term for someone attached to a household and available for many duties.

From what you've described over time—driving you, handling errands, helping with practical matters, keeping an eye on things around the compound, and generally making life easier—I'd probably call Pok your caretaker and personal assistant, or informally your factotum.

"Factotum" is a lovely word, though most people would need a dictionary. It literally means "do everything."

Ah, factotum.  Perfect or is it a bit high-falutin?

Not especially. It's educated vocabulary, but not pretentious if used naturally.

The nice thing about factotum is that it captures exactly what you're describing: someone who isn't merely a driver, gardener, handyman, secretary, valet, or caretaker, but a person who ends up doing a bit of all of them.

P. G. Wodehouse used it frequently, and older English speakers would have encountered it in literature. The word has a slightly affectionate flavor, as if you're acknowledging that the person is indispensable because they somehow manage everything.

If someone asked, "Who's Pok?" you could say:

    "He's my factotum."

If they looked puzzled, you could add:

    "He does a little of everything—driver, errand runner, handyman, assistant, problem solver."

That actually sounds rather elegant and accurate for the role you've described. It also avoids the class implications of "servant" and the misleading specificity of "chauffeur" or "valet."

In fact, if I met an elderly expatriate in Cambodia who referred to his factotum, I'd immediately have a pretty good idea of the arrangement. It's one of those rare words that says in one word what would otherwise take a sentence.

That fits with what you've described of rural Cambodian life. In many traditional households there, duties are still divided quite sharply by gender. Cooking, laundry, and much of the housework are often viewed as women's work, while men are expected to handle driving, repairs, errands, security, heavy lifting, dealing with officials, and similar tasks.

In that context, Pok's role sounds even more like a classic factotum. He isn't functioning as a valet or housekeeper. He's the person who gets things done: driving you, running errands, fixing problems, dealing with practical matters, helping you navigate local systems, and generally being available when something needs attention.

Historically, many factotums had exactly that sort of role. If a gate broke, they fixed it or found someone who could. If supplies were needed, they got them. If a visitor arrived, they dealt with it. If their employer needed transportation, they drove.

So in your household, Nana and Pok almost sound like complementary roles: Nana manages the domestic side, while Pok handles the practical and external side.

It's also worth noting that "factotum" doesn't carry any implication about gendered household chores one way or the other. It simply means "the person who does whatever needs doing," which seems to match Pok rather well.

To me, "right-hand man" sounds like assistant to a plumber or bricklayer or mechanic.

I can see that. In American English, "right-hand man" often suggests a trusted subordinate in a business, political, or trades context:

    "Joe is the boss's right-hand man."

    "Mike is the foreman's right-hand man."

It emphasizes loyalty and authority delegated from the principal rather than the wide variety of tasks performed.

For Pok, it misses the breadth of the role. It sounds as though he occupies a defined position in an organization, whereas your descriptions make him sound more like the person who handles whatever practical matter arises.

In fact, the more you've described him, the more factotum seems the right word. It's one of the few English terms that doesn't imply dressing you (valet), managing the household staff (major-domo), providing personal care (attendant), or holding a formal office (assistant). It simply means the indispensable fellow who somehow takes care of everything that falls into his sphere.

There's also an old British colonial flavor to it. If I encountered a memoir that said,

    "My factotum, Pok, took care of the arrangements,"

I would immediately picture someone very much like the Pok you've described: driver, fixer, interpreter of local customs, errand-runner, handyman, and general solver of problems.

Not many words earn their keep that efficiently.

Pok prefers caregiver, the other term is not much known and caregiver for an old person has a lot of face.

Ah, yes—that changes the picture quite a bit. Caregiver makes perfect sense if that's the term Pok wants to use.

And "face" is exactly the point. In that context, caregiver doesn't mean "servant"; it means a person entrusted with looking after an older person. That's a respectable position, and presumably one that Pok can explain to other people without having to explain some obscure English word.

So I'd distinguish the two:

To Pok and the local community: caregiver — clear, respectable, and carries face.

When you're describing his actual function in English: factotum — wonderfully precise, if somewhat literary.

And there's no contradiction between them. A caregiver can also be a factotum. The first describes his social role, while the second describes the almost comically broad range of things he actually does.

I suspect Pok would quite reasonably prefer the former. "I'm Frank's caregiver" sounds like a responsible position. "I'm Frank's factotum" sounds like you've been reading too much Wodehouse. 😄