am 3126-3165, bc 878-839
Joash: Joash, יואשׁ [Strong's H3101], or יאשׁ [Strong's H3101], is merely an abbreviation of Jehoash, יהואשׁ [Strong's H3060], by the elision of ה, hay, and here also of ו, wav. 2Ki 11:21, 2Ki 12:1, Jehoash, 1Ch 3:11
seven years old: As Joash was hidden six years in the temple, and was but seven when he came to the throne, he could have been but one year old when secreted by his aunt.
Reciprocal: 2Ch 34:1 - eight years