Why does "we" in Xiong Er's mouth mean "we"? My education is not high. I don't think the word "an" means "miscellaneous"

We are Shandong dialect, but this word is very common in the north and all over the country. The popular areas are mainly northern dialect areas, such as Shandong, Hebei, Henan, Shaanxi and Northeast China. Northeasters were originally formed by Shandong people and Hebei people who traveled eastward in the Qing Dynasty, and they have not existed since ancient times. The tone is slightly different, but it is nothing more than these meanings: I, we, mine and ours.

The ancient "I" has been reading NG m: I, and it has been completely preserved in Hakka dialect. At present, the initials in many places in the north are still pronounced ng, which is well documented (for example, people who read martial arts legends can know it by watching Shaanxi dialect). "I" was originally a derivative of the word "I", pronounced ng m: n, which is still the same sound in the old Shandong dialect. Later, because there was no ng initial in Mandarin, it became M: N.