1CPL ונ ְ חַנ versus ונ ְ חַנ ֲ א

In Biblical Hebrew (BH), there are three notable forms of the first-person plural independent subject pronoun: standard אֲנַחְנוּ and non-standard נַחְנוּ and אנו. Each of the forms finds support beyond BH, whether in other forms of ancient Hebrew or cognate languages. Additionally, the development of two of these forms is the subject of an interesting linguistic debate, with differing opinions on whether אֲנַחְנוּ or נַחְנוּ is the more archaic form, reflecting varying theories on their historical usage and evolution.
The evidence suggests that while נַחְנוּ may be older, אֲנַחְנוּ became established as the standard form in Classical Biblical Hebrew (CBH). The fact that the Tiberian Pentateuch preserves minority cases of נַחְנוּ (in quoted speech), matching the only form found in Iron Age II Hebrew epigraphy, whereas the rest of CBH, along with the Samaritan Pentateuch, consistently resorts to אֲנַחְנוּ is taken here as evidence of sub-chronolects. Analysis of the purported sources of the Pentateuch indicates that all sources primarily employ the standard form, with instances of נַחְנוּ appearing mostly in the J and P sources.