Question: I wish to write the name of pdfTeX's author:

[![enter image description here](https://i.stack.imgur.com/OotqYm.png)](https://i.stack.imgur.com/OotqYm.png)

I am not able to figure out how to write the middle name. I tried`Th\'{\^{e}}`, but it doesn't return the desired output.

It's different from the similar double accent question: [Multiple diacritics on one character](https://tex.stackexchange.com/questions/159291/multiple-diacritics-on-one-character) since the answer there (using TIPA) doesn't work here. This is a very specific situation.

Answer: 
It's a vietnamese name so for the best result you need a vietnamese font encoding:

```
\documentclass[]{scrreprt}
\usepackage[utf8]{inputenc}
\usepackage[T5,T1]{fontenc}

\begin{document}

T5: {\fontencoding{T5}\selectfont H\`an Th\'\ecircumflex{} Th\`anh}

T1: H\`an Th\'{ê} Th\`anh
\end{document}

```

[![enter image description here](https://i.stack.imgur.com/Lu4iY.png)](https://i.stack.imgur.com/Lu4iY.png)

With xelatex or lualatex you can input the character (U+1EBF) directly or use the accent command from xunicode:

```
\documentclass{article}
\usepackage{fontspec}
%\setmainfont{Charis SIL}

\begin{document}
Hàn Thế Thành

Hàn Th^^^^1ebf Thành

Hàn Th\textcircumacute{e}  Thành

\end{document}

```

[![enter image description here](https://i.stack.imgur.com/l7PKu.png)](https://i.stack.imgur.com/l7PKu.png)
Based on [Stefan Pinnow](https://tex.stackexchange.com/users/95441/stefan-pinnow)'s comment I found the solution:

using [stackengine](https://www.ctan.org/pkg/stackengine?lang=en) package we can write:

```
\documentclass{article}
\usepackage{stackengine}
\renewcommand\stacktype{L}
\begin{document}
H\`an Th\stackon[3pt]{\^{e}}{\'{}} Th\`anh
\end{document} 

```

Note: I couldn't find the desired symbol in [TIPA](https://www.ctan.org/pkg/tipa) package.