Hot answers tagged spelling-variants
דוד is referring to King David. דויד is referring to Moshiach ben David specifically as Melech HaMoshiach. This is brought in Kol HaTor 2: 2. This is also brought in Be'er Yitzchok on Likkutei HaGra 63.
The reason is because of david's friendship with Jonathan. A yud was added to David's name and a 'hei' to Jonathan's. To show that their great friendship had hashem's blessing. Since these were 'additions' one doesnt use them in spelling their names. Although R Yehonasan Eibeshuts did add the 'hei'. I will have to look for the source.
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