Why did Android Q become Android 10?

Adroid Q was Android 10 from the beginning. Android versions have always a name and a number.

• Apple Pie ……………… 1.0
• Banana Bread ………… 1.1
• Cupcake ………………. 1.5
• Donut …………………. 1.6
• Eclair ………………….. 2.0 – 2.1
• Froyo ………………….. 2.2 – 2.2.3
• Gingerbread …………… 2.3 – 2.3.7
• Honeycomb …………… 3.0 – 3.2.6
• Ice Cream Sandwich ….. 4.0 – 4.0.5
• Jelly Bean ……………… 4.1 – 4.3.1
• KitKat …………………. 4.4 – 4.4.4
• Lollipop ………………… 5.0 – 5.1.1
• Marshmallow ………….. 6.0 – 6.0.1
• Nougat ………………… 7.0 – 7.1.2
• Oreo …………………… 8.0 – 8.1
• Pie ……………………… 9.0
• Android Q ……………… 10.0

Android version history - Wikipedia

There are some differences between spanish and english versions of the Wikipedia article.