Help me find my great-great-great-grandmother's surname

[visual rune]

My great-great-great-grandmother was Hakka. I don't know where she originally came from. I only know that she went to Guangdong and married my great-great-great-grandfather. Her family were merchants. Later, they moved to Vietnam in the late 19th, where she passed away. Her grave has the surname written in Vietnamese Quốc Ngữ (the current Latin-based Vietnamese script). Her surname is recorded as Gia. However, I don’t know how her name was written in Han characters. The image I attached contains all the Chinese characters that can be pronounced as Gia in Vietnamese. Please help me find the character. Thank you very much.

[ivory plover]

贾 probably

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贾 is pronounced as Giả in Vietnamese. But I think this can be a good theory because maybe it was written in the wrong tone, or the grave is too old that the tone mark fell off

Is it common in Hakka people?

[ivory plover]

no It is not one of the surnames with the highest number'

but in the given pic there is few surname

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After my family carefully examined the gravestone, I used the method of shining parallel light at night onto the surface of the tombstone and discovered that there was indeed a worn tone mark on my grandmother’s name. Her surname is indeed Giả (賈). This makes a lot of sense because the Hakka people originate from northern regions such as Hebei, Shanxi, Henan,... where the surname 賈 is quite common. Thank you so much for helping me

[ivory plover]

np