I'm not sure what kind of palm it is. It looks like a syagrus palm, but the branches and leaves have hooked thorns. If anyone knows, please advise. Thank you very much.

Might be Syagrus schizophylla which is the only Syagrus species that has petiole thorns.

Lytocaryum weddellianum

Looks like some type of rattan palm. (Calamus) Syagrus weddelliana is not armed, among other differences,(name change from Lytocaryum) and I doubt it’s S. schizophylla.

I’d check a palms of Thailand reference.

Tim

I'll second this guess:  Syagrus schizophylla

Correction: I agree with @realarch - I overlooked the photo of the teeth on the petioles. Also, if this is in habitat (native) in Thailand, it cannot be wedelliana or schizophylla. Not to mention, the base and fronds do not look like Schizophylla to me. It does look like it would fit into the Calamus genera, but with it not having an armed trunk, I'm uncertain to the species. Best of luck - hopefully someone on here can give a definitive answer.

I was thinking Calamus as well, just based on seeing a Daemonorops Jenkinsiana at Leu Gardens. 

Looks like S schizophylla to me. For those above discounting this - any particular reason? I think I spy some other non native plants so I’m not sure it’s necessarily a palm in habitat. I know there are 100s of Calamus species and most I’m not particularly familiar with, but the appearance and growth habit just doesn’t say Calamus to me. 

@tim_brissy_13 I changed my mind, I think you are right.  I zoomed in on the trunk area on a couple of photos, and there's no sign of the vicious spikes of Calamus.  But a deep shade Schizophylla would definitely stretch out like that, and the frond shape and rachis teeth are consistent. 

Note zero visible flesh-shredding spikes below, I think this rules out all the Calamus types.  Maybe @Alexberm can confirm that the lower trunk was smooth and thornless?

7 hours ago, Merlyn said:

@tim_brissy_13 I changed my mind, I think you are right.  I zoomed in on the trunk area on a couple of photos, and there's no sign of the vicious spikes of Calamus.  But a deep shade Schizophylla would definitely stretch out like that, and the frond shape and rachis teeth are consistent. 

Note zero visible flesh-shredding spikes below, I think this rules out all the Calamus types.  Maybe @Alexberm can confirm that the lower trunk was smooth and thornless?

Yes I can confirm that.

Here are photos of one of many schizo palms in my yard.